Part A Determine the work a hiker must do on a 12.3 kg backpack to carry it up a hill of height h = 13.0 m . The hill is not an even slope but rather an irregular curve as in the figure(Figure 1). Express your answer with the appropriate units. ? W = Value Units Submit Request Answer Part B Determine also the work done by gravity on the backpack. Express your answer with the appropriate units. HA ? Wgravity = Value Units Submit Request Answer P Pearson