A man with mass M has its string'.attached to one end. of a spring which can move without friction along a horizontal, overhead fixed rod. The other end of the spring is fixed to a, wall. The spring constant is k. The string is massless and inextensible and it maintains a constant angle `theta` with the, overhead rod, even when the man moves. There is friction, iwith coefficient `mu` between the man and the ground. What is, the maximum distance (in m ) that the man moving slowly can stretch the spring beyond its natural length?