The demand for a product can be approximated by , where represents the price of the product, in dollars, and is the quantity demanded.

(a) Find the elasticity function.

(b) Evaluate the elasticity at .

(c) Should the unit price be raised slightly from dollars in order to increase revenue?

(d) Use the elasticity of demand to find the price which maximizes revenue for this product.
dollars per item
Round to three decimal places as needed.