When creating a right-endpoint Riemann sum on the interval [56, 177.8] using 45 rectangles, the 6th endpoint used calculate the height of the approximationg rectangle would be O a. 177.8 O b. 56 O C. 88.4800 O d. 48.7200 O e. 72.2400If the average value of f(x) on [a,b] is 1 and the average value of f(x) on [b,c] is 1 where a is less than c is less twan b, then the average value of f(x) on [a,c] is 1. Select one: O True O False