Sorry forgot to add to your homework assignment; when drafting all the fronts and backs please mark the scales that correspond to the marks/lines, the measurement you are using for the front/back neck to waist as well as the half waist and half hip measurements. This repetition will ingrain them in your brain so there will be less chance for error.
Don't forget to recite our drafting two-step as you proceed.
1, 2, 3, slide, 4, 5, 6, draw the line for the shoulder incline
Maria Calautti, "Jack of all trades"