If the supply equation is Q = 170 + 8P + 0.5p2 (a) find the price elasticity of supply if the current price is 9. (b) estimate the percentage change in supply if the price rises by 2%. (a) (Do not round until the final answer. Then round to two decimal places as needed.) ( b ) (Do not round until the final answer. Then round to two decimal places as needed.)