[填空题]
A 65-kg person jumps from a window toz6a 0aggo+s: xvk7+oy a fvd9d*x5xh5,t:bnkd / btb dj0 ire net 18 m below, which stretches the net 1.1 m. Assume that the net behaves like a simple spring bbd*j ,x/vb5dk9dh5ttx:dn0 , and
(a) calculate how much it would stretch if the same person were lying in it. m
(b) How much would it stretch if the person jumped from 35 m? m