PLEASE HELP 15 POINTS What is the purpose of a repeat command? a) to give input b) to engage memory c) to save time when writing code d) to rotate objects

Aline ab is in 1st quadrant , its ends a and b respectively are 20mm and 60mm infront of vp respectively . the distance between the end projectors is 75 mm . the line is inclined at 30 degrees to the hp and end a 20 degrees above the hp . draw its projections , find true length