A local canoe manufacturer analyses their business over the past year. They determine that if they manufacture and sell x canoes, their manufacturing costs can be modeled by the equation: C'(x) = 7500+ 190x + x and they are able to sell each canoes for a price determined by: p(x) = 800 - 0.4x a) Determine the marginal cost when they produce 100 canoes. (No units, round to nearest whole number) A/ b) Determine the marginal revenue when they sell 100 canoes. (No units, round to nearest whole number) A/ c) Determine the number of canoes they must sell to maximize their profits. (No units, round to nearest whole number) d) What selling price will maximize the profit? (No units, round to two decimal places)