F=,dd +(I)  1Courier New1Symbol New1Courier New1Courier NewTimes New RomanTimes New Roman1Courier New1Courier New1Courier New1Courier NewQPTQPTQPTQPT?/ <```@@@?~~~~~ԱޱޱԱ޿޿ph (((Pdd{ d< p {2D ]UhR@W@?M@[;%{@@???sGe oAr  @p躰@@@033333??@^ߛOw?HzG???z8v I@R x@@?@ @@@?@@?@?@?@Xy@@@@/2??h!@$$$Xy@@xXy@n@pE@???,048<@DHDQflOLL ucos(t)usin(t) sqrt(u^2+a)*x = ucos(t); y = usin(t); z = sqrt(u^2+a)rPrP/2??h!@$$$@@ ?@P6 ?@??? `Plubtx = u; y = b; z = t/2??h!@$$$@@P6 @@???HDJ_lH(Dcutx = c; y = u; z = t/2??h!@$$$@@@@g????`tudx = t; y = u; z = d/2??h!@$$$Xy@@xpEXy@n@???HDCXlAPLucos(t)usin(t) -sqrt(u^2+a)+x = ucos(t); y = usin(t); z = -sqrt(u^2+a)xyzGzףp= ?ףp= (\JXT@@@@@@@@@@@@@@@@@@@@@@@@@@@@T @T @T @x = ucos(t); y = usin(t); z = sqrt(u^2+a)<"@h\H@x = u; y = b; z = t<" ޾5@H&~%m@dx = c; y = u; z = t<"T5@0(~@s=@x = t; y = u; z = d<"QV@cŒk@x = ucos(t); y = usin(t); z = -sqrt(u^2+a)<"@?M@Pkȇ@J4@