W (ft) 100 75 50 25 0 100 200 300 x (days) (a) Determine the intervals on which the function W is increasing. (Select all that apply.) 0 (0, 150) O (150, 300) O (300, 365) Determine the intervals on which the function W is decreasing. (Select all that apply.) 0 (0, 150) O (150, 300) O (300, 365) (b) At what value of x does W achieve a local maximum? days At what value of x does W achieve a local minimum? days (c) Find the net change in the depth W from 200 days to 300 days.