Shoe Full solution please
Extracted text: A spring with an unstretched length of 5 in expands from a length of 2 in to a length of 4 in. The work done on the spring is in-lb. O [0.5 k(4 in)- 0.5 k(2 in)*] O 0.5 k(3 in) - 0.5 k(1 in)? O (0.5 k(3 in) - 0.5 k(1 in)*] O 0.5 k(2 in)