4. [12 Points] DETAILS OBINPHYSS 3.P.023. A 33 kg child uses a pogo stick to bounce up and down. The spring constant, k, of the toyr equals 9,450 N/m. (a) By how much would the spring be compressed by the child if she simply balanced herself vertically on the pedals of the stick? (Give your answer in cm.) :cm (b) How much energy (in J) is stored in the spring under this circumstance? :1 Need Help