: Tshirt manufacturer is planning to expand its workforce. It estimates that the number of T-shirts produced bf given by T(x) '2 0.?5x4 + 9x3, 0 s x S 9. When is the rate of change of Tshirt production increasing and when ' oint of diminishing returns and the maximum rate of change for Tshirt production? Graph T and T' on the same he rate of change of Tshlrt production is increasing on D. >(Type your answer in interval notation.) L The rate of change of T-shirt production is decreasing on I: 'g (Type your answer in interval notation) The point of diminishing returns is x: D workers. T he maximum rate of change for Tshirt production is D T-shirts per worker