Two 150 lb engineering students, A and B, intend to jump off abridge from rest using an elastic cord

Two 150 lb engineering students, A and B, intend to jump off abridge from rest using an elastic cord (bungee cord) having astiffness k=80 lb/ft. they wish to justreach the surface of theriver, when A (attached to the cord) lets go of B at the instantthey touch the water. determine the proper unstetched length of thecord todo the stunt and calculate the maximum acceleration ofstudent A and the maximum height he reaches above the water afterthe rebound. From your results, commenton the feasibility of doingthis stunt.I'm completely lost, I have no idea how to even start thisproblem. Please help!!