A T-shirt manufacturer is planning to expand its woddorce. It estimates that the number of T-shirts produced by hiring it new workers is given by T(x) = 0.253:4 + 7x3. 0 s x s 21. When is the rate of change 0! T-shirt production increasing and when is it decreasing? What is the point of diminishing returns and the maximum rate 0! change to: T-shirt production? Graph T and T' on the same coordinate system