Solve the all parts of given problem:
Problem: A slingshot consists of a light leather cup attached between two rubber bands. It takes a force of 28 N to stretch the bands 1.3 cm.
Part A: What is the equivalent spring constant of the rubber bands?
Part B: How much force is required to pull the cup of the slingshot 2.4 cm from its equilibrium position?
I need help to find the equivalent spring constant of the rubber bands.