A Customer purchases 8 rolls of stickers at $5 per roll from a retail sticker warehouse. Every $0.25 decrease in price results in a client buying one additional roll.

(a) If x represents the number of $0.25 decreases in price, what will be the revenue function R(x)? [Note: In general, revenue is the product of selling price and quantity sold.]

(b) According to this model, at what sticker price will the revenue from stickers be $48?