Length of upper body (including head), L = 69cm OC = 0.554m Mass of body, M = 62kg OA = 0.304m /...... Mass of head and arms, m = 8.06kg OB = 0.414m W1 = 20+8.06=28.06kg W2 = 24.8kg please help to answer Investigation2-Vertically straight back Aim The aim of investigation 2 is to compare the compression force found in investigation 1 above with the compression force in a situation where you pick up the 20 kg mass with a vertically straight back by bending your knees. 1. Draw a force diagram for a situation where the upper body is vertical. 6. Determine the magnitude of the compression force in the situation where you pick up the 20 kg mass with a vertically straight back by bending your knees and keeping it static. 7. Draw a conclusion about the best practice for picking up the 20 kg mass based on your results