FG=,dd +(I)  1Courier New1Symbol New1Courier New1Courier NewTimesr NewTimesr New1Courier New1Courier New1Courier New1Courier NewQPTQPTQPTQPT?/ <```@@@?~~~~~ԱޱޱԱ޿޿ph (((Pdd{ d< p {2j ?@,u7@@_Aknr@أ PO@???H^l(@ƼU@(Iw@~kD@!ʡE)p= ף~kD@@!ʡE@)p= ף@033333??@^ߛOw?HzG???zqo I@cx@@?@ @@@?@@@@@@@@s@ ףp=̬s@@ ףp=@̬@@/2??h!@$$$@@@@@???'d #!K!R!!lI3 ((@(tut^2-u^2x = t; y = u; z = t^2-u^2iTiT02??h!@$$$@?@?P@???@sǸ?d "2"D\"U"T!t%%&(,((8r(Du(r($(t0t^2x = t; y = 0; z = t^202??h!@$$$@?P?@????@sǸ?  $l($'0(('''('0t-t^2x = 0; y = t; z = -t^242???$$$??@ ףp=PQGz@@ ףp=@PQ????sǸ?|%$&$'$($)$*$+$,$%%2.502.5^2-2.5$seg (2.5,0,2.5^2) to (-2.5,0,2.5^2)02.5^242???$$$??@333333?@̴???sǸ?tO4xP4|Q4R4S4T4U4hk"8'd402.5-2.5^20&seg (0,2.5,-2.5^2) to (0,-2.5,-2.5^2)-2.5-2.5^252???$$$8Ov@??@??@???@(,048<@P('4002.5^2(x,y,z) = (0,0,2.5^2)52???$$$y,MN???????,$-$.$/$0$1$2$p4H''00-2.5^2(x,y,z) = (0,0,-2.5^2)02??h!@$$$??/y>@ʾ̴@VPv@ʾ?@333333@??? V4W4X4Y4Z4[4\4D4Q(R(S(R('(S( 2.5cosh(t) 2.5sinh(t)2.5^2*x = 2.5cosh(t); y = 2.5sinh(t); z = 2.5^202??h!@$$$??VPvʾ̴@/y>ʾ?@333333@??? DHLPTX\''$'''T(X' -2.5cosh(t) 2.5sinh(t) 2.5^2,x = -2.5cosh(t); y = 2.5sinh(t) ; z = 2.5^202??h!@$$$??ʾ/y>@@333333ʾ?VPv@̴??? 3$4$5$6$7$8$9$pW(2'3'4'tX(X(3' 2.5sinh(t) 2.5cosh(t) -2.5^2,x = 2.5sinh(t); y = 2.5cosh(t) ; z = -2.5^202??h!@$$$??ʾVPv@333333ʾ?/y>̴??? ]4^4_4`4a4b4c45'ܕ&&&L[([(& 2.5sinh(t) -2.5cosh(t) -2.5^2-x = 2.5sinh(t); y = -2.5cosh(t) ; z = -2.5^202??h!@$$$@?cFW1 Vf1fPv@zl?P@???`dhlptxT&$<$4"$<4sqrt(t)cosh(.5)sqrt(t)sinh(.5) t1x = sqrt(t)cosh(.5); y = sqrt(t)sinh(.5) ; z = t02??h!@$$$@?Pvf1fcFW1 V?zl?P@???:$;$<$=$>$?$@$!A"B"%%!""-sqrt(t)cosh(.5)sqrt(t)sinh(.5)t1x = -sqrt(t)cosh(.5); y = sqrt(t)sinh(.5); z = t02??h!@$$$@?PvzlcFW1 V?f1f?P@???d4e4f4g4h4i4j4W#< u$l3v$Pv$Xx$-sqrt(t)cosh(-.5)sqrt(t)sinh(-.5)t3x = -sqrt(t)cosh(-.5); y = sqrt(t)sinh(-.5); z = t02??h!@$$$@?cFW1 VzlPv@f1f?P@???|$t X ] X  Y |[ sqrt(t)cosh(-.5)sqrt(t)sinh(-.5)t2x = sqrt(t)cosh(-.5); y = sqrt(t)sinh(-.5); z = t02??h!@$$$@?f1fcFW1 VPzl?Pv@????A$B$C$D$E$G$H$ Li i  ##8#sqrt(t)sinh(.5)sqrt(t)cosh(.5)-t1x = sqrt(t)sinh(.5); y = sqrt(t)cosh(.5); z = -t02??h!@$$$@?f1fPvPzl?cFW1 V?????k4l4m4n4o4p4q47't t \y x!"Tw sqrt(t)sinh(.5)-sqrt(t)cosh(.5)-t2x = sqrt(t)sinh(.5); y = -sqrt(t)cosh(.5); z = -t02??h!@$$$@?zlPvPf1f?cFW1 V?????X5|44Z5D5D5PG5sqrt(t)sinh(-.5)-sqrt(t)cosh(-.5)-t4x = sqrt(t)sinh(-.5); y = -sqrt(t)cosh(-.5); z = -t02??h!@$$$@?zlcFW1 VPf1f?Pv@????I$ J$K$L$M$N$ O$4le5&f5@&t& 5sqrt(t)sinh(-.5)sqrt(t)cosh(-.5)-t3x = sqrt(t)sinh(-.5); y = sqrt(t)cosh(-.5); z = -t42???$$$??ss@ @ @???sǸ?ĸȹ̺@t5 55 2.5cosh(.5) 2.5sinh(.5)2.5^2 2.5sinh(.5)Hseg (2.5cosh(.5),2.5sinh(.5),2.5^2) to (2.5sinh(.5),2.5cosh(.5),-2.5^2) 2.5cosh(.5)-2.5^242???$$$??ss@ @ @???sǸ?'s4t4u4 v4w4x4l'x55 -2.5cosh(.5) 2.5sinh(.5)2.5^2 -2.5sinh(.5)Jseg (-2.5cosh(.5),2.5sinh(.5),2.5^2) to (-2.5sinh(.5),2.5cosh(.5),-2.5^2) 2.5cosh(.5)-2.5^242???$$$??ss@ @ @???sǸ?лԼؽܾ Y'!̇  -2.5cosh(.5) -2.5sinh(.5)2.5^2 -2.5sinh(.5)Lseg (-2.5cosh(.5),-2.5sinh(.5),2.5^2) to (-2.5sinh(.5),-2.5cosh(.5),-2.5^2) -2.5cosh(.5)-2.5^242???$$$??ss@ @ @???sǸ?;( <($=((>(,?(0@(4A(~555 2.5cosh(.5) -2.5sinh(.5)2.5^2 2.5sinh(.5)Jseg (2.5cosh(.5),-2.5sinh(.5),2.5^2) to (2.5sinh(.5),-2.5cosh(.5),-2.5^2) -2.5cosh(.5)-2.5^2xyzJXT@@?@@@@@@@@@@@@@@@@@@@@@@@@@@@T2 @T2 @T2 @z = x^2 - y^2"E'^/}0eC8{P#@A@Times New Romanx = t; y = u; z = t^2-u^2z = uE&01íncf@ÿCPO@1Courier New\x = t; y = 0; z = t^2E&01U~C@r<::3@1Courier Newx = 0; y = t; z = -t^2  ! E&01@0񓼍#v6$6@1Courier Newseg (2.5,0,2.5^2) to (-2.5,0,2.5^2)E&01e0m@#wPǽur/c@1Courier Newseg (0,2.5,-2.5^2) to (0,-2.5,-2.5^2)E&01e0m@#wPǽu(ݱ@1Courier New<(x,y,z) = (0,0,2.5^2)E&01e0m@#wPǽuKZ"@1Courier New(x,y,z) = (0,0,-2.5^2)E&01mg@Z,ݔ] @1Courier Newx = 2.5cosh(t); y = 2.5sinh(t); z = 2.5^2/E&01mg@Z,ݔ@1Courier Newdx = -2.5cosh(t); y = 2.5sinh(t) ; z = 2.5^2/E&01mg@Z,ݔYHl@1Courier New8B( x = 2.5sinh(t); y = 2.5cosh(t) ; z = -2.5^2/E&01mg@Z,ݔNw@1Courier NewB( x = 2.5sinh(t); y = -2.5cosh(t) ; z = -2.5^2/E&01mg@Z,ݔ f@1Courier NewC( x = sqrt(t)cosh(.5); y = sqrt(t)sinh(.5) ; z = t```E&01S@=r :}E;24@1Courier New`D( x = -sqrt(t)cosh(.5); y = sqrt(t)sinh(.5); z = t00```E&01_1q@.*AM/Äc\@1Courier NewE( x = -sqrt(t)cosh(-.5); y = sqrt(t)sinh(-.5); z = t```E&01b>|@B";7Z@1Courier NewE(x = sqrt(t)cosh(-.5); y = sqrt(t)sinh(-.5); z = tt"```E&011;z8@>} g/}[?1Courier NewbʈF(x = sqrt(t)sinh(.5); y = sqrt(t)cosh(.5); z = -t```E&01b>|@B b#?1Courier New@G(x = sqrt(t)sinh(.5); y = -sqrt(t)cosh(.5); z = -tE&01>9@,fHz=Hg+?1Courier NewG(x = sqrt(t)sinh(-.5); y = -sqrt(t)cosh(-.5); z = -t@E&01(b9?@z5XzT[?1Courier NewH(x = sqrt(t)sinh(-.5); y = sqrt(t)cosh(-.5); z = -tE&01(b9?@z5XpK:?1Courier NewhI(seg (2.5cosh(.5),2.5sinh(.5),2.5^2) to (2.5sinh(.5),2.5cosh(E&01`9?@yaTI:Q1Courier New J(seg (-2.5cosh(.5),2.5sinh(.5),2.5^2) to (-2.5sinh(.5),2.5cosE&01xխ@v-߭q1Courier NewJ(seg (-2.5cosh(.5),-2.5sinh(.5),2.5^2) to (-2.5sinh(.5),-2.5cE&01࿴@3pQ{q|1Courier New]K(seg (2.5cosh(.5),-2.5sinh(.5),2.5^2) to (2.5sinh(.5),-2.5cosE&01࿴@3pQd""@1Courier New