4. [2 pts] Write a Python function power (f,n) that takes a function f and an integer n, and returns a function that applies the function f to its argument n times. For example: power(f,0)(x) power(f, 2) (x) f(f(x)) # this case is the same as twice(f) power(f,5) (x) = f(f(f(f(f(x))))) = X = If f is the incr function: def incr(x): return x+1, and x=5, then the above three calls would produce 5,7,10, respectively