The weekly cost (in dollars) to manufacture x bicycles and y tricycles is: H) b) C) d) C(x,y] =20,000+60x+20y+50\\/xy Determine the marginal cost of a bicycle (2 points) Determine the marginal cost of a tricycle (2 points) Determine the average cost 5 (x, y) (1 points) Determine the marginal average cost of a bicycle at a production level of ve bicycles and ve tricycles (2 points) Determine the marginal average cost of a tricycle at a production level of ve bicycles and ve tricycles (2 points) Determine the following second order partial derivatives 2 2 2 2 aC(x,y), 6 C(x,y), A6 C(x,y) and?2C(x,y) (6p01'nts) 5x2 6x8); (3an 0y