A child's toy consists of a m=35g monkey suspended from a spring of negligible mass and spring constant k . When the toy monkey is first hung on the spring and the system reaches equilibrium, the spring has stretched a distance of , x=12.7cm, as shown in the diagram. This toy is so adorable you pull the monkey down an additional d=6.3cm from equilibrium and release it from rest, and smile with delight as it bounces playfully up and down.

Using the given information, determine the spring constant, k , in Newtons per meter, of the spring.