The natural length of a spring is10cm and a force of15N must be exerted hold it stretched to a length of25cm.

a) Please find, in Newtons, the forceF(x)required to stretch the spring fromxmeters (with respect to its equilibrium position). Please be careful with units

b)Find, in Joules, the amount of work required to stretch the spring from10cm to25cm. Please be careful with units c)Find, in Joules, the amount of work required to stretch the spring from 25cm to40cm. Please be careful with units