A line AB is in the first quadrant. Its front view is 90 mm long and makes angle of 45◦ with the xy reference line. The end A is in H.P. and is 50 mm in front of V.P. The line AB is inclined 40◦ to the V.P. Draw the first angle projections of AB. Find the true length of AB using two methods, and verify that those two methods yield the same length.