A block A, whose weight is 100 N, is pulled up a slope of length 5 m by means of a constant F 100 N

A block A, whose weight is 100 N, is pulled up a slope of length 5 m by means of a constant force F (= 100 N) as illustrated in Fig.
(a) what is the work done by the force F in moving the block A, 5 m along the slope?
(b) By how much has the potential energy of the block A increased?
(c) Account for the difference in work done by the force and the increase in potential energy of the block.