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Find the inflection point(s) of the function f(x) = x * e-x. Select one: O f(x) has an inflection point at x = -2 and x = 2 O f(x) has an inflection point at x = 2 O f(x) has an inflection point at x = 1 O f(x) has an inflection point at x = 5 and x = 2For the first three months of an exercise program, Joan's muscle mass increased, but at a slower and slower rate. Then there was an inflection point in her muscle mass, as a function of time. What happened after the first three months? Select one: O a. The rate of change of her muscle mass changed from positive to negative. O b. Her muscle mass continued to increase, but now at a faster and faster rate. O C. Her muscle mass began to decrease. O d. Her muscle mass reached its maximum and remained constant afterward