[填空题]
A 65-kg person jumps from a window to a fire net 18 m below, whichi.niy7c a 6g5c x+epc--hixo(n/; icogk8 t.m stc2aml*a6xu**dhfk 5+rwxq; 7p xu 3meretches the net 1.1 m. Assume that the net behaves like a simple sprxa*;au*2kx*+hrm pw6 c7qxf ul5d 3meing, 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