please help with b and c asapppp within 10mins thq

2. In the situation that is depicted in Fig. 2(a) only the gluteus muscle-tendon complex is active. During adduction of the bone, the femur rotates. The point of application of this muscle on the trochanter B follows a circular path. The point of application on the acetabulum A is given by the vector xA=Ley. (25 marks) (a) When the adduction angle =0, the length of the muscle is l=lC. Calculate the force vectors FA and FB as a function of the adduction angle . (10 points) (c) To find our how much the muscle and the temdon are exterded when the complex as a whole is loaded with a force Fg. a twobar model can be ased (Fle. 2(b)). Bar 1 is modeled as a cone-shaped one with a length of t1. diameters of D1 and d1 of the two ends, and a Young"s modutus of E1. At point C, Bar 1 is attached to Bar 2 , which is also modeled as a cone-shaped bar with a length of t2, diameters of d1 and D2, and a Young's modulus of E2. At points A and B,B ars 1 and 2 are fixed rigidly, respectively. Determine the stress (x) and the strain (x) in the cross section when x=3t2 (between A and C ) and a cross section x=l1+3t2 (between C and B).(13 points) (a) (b) Fig. 2 Question 2