A right regular pyramid with height h and a base consisting of a regular n- sided polygon of side length s has a volume V = Ah and total surface area S = A + inst where A is the base area and / the slant height, which may be calculated from the apothem of the base polygon, a = as A = nsa and 1= h + a. Use these formulas to define a function, pyramid_AV, returning V and S when passed values for n, s and h.