Uncertainty propagation. Steps shown to get to answer much appreciated! :)

3. A more complete example To determine the amount of wallpaper q needed for a square room, a decorator measures: Wall height, h = 2.49 + 0.01 m Wall width, w = 2.10 + 0.01 m Area of windows and doors, A = 3.51 + 0.06 m2 Find q = 4hw - A and its uncertainty. (Answer: q = (17.4 + 0.2) me (+ 1%))