Suppose that the total revenue, R(x) (in pesos), from the sale of x products is given by R(x) = 2x - 3r +5. Find the following: (a) the average rate of change of the revenue in the interval: [10,50] i [10,100] (0,100 (b) the instantaneous rate of change of the revenue at: i. X 10 i x= 50 X= 100