A$)$ What is the effective capacity of the factory? Round your answer down to the nearest whole number and use this answer in subsequent computations. B$)$ Given the five$-$year forecast, how much extra capacity is needed each year? Round your answers to the nearest whole number. C$)$ Does the firm need to buy more machines? If so$,$ how many? When? If your answer is zero, enter $"0".$ Round your answers up to the nearest whole number.