Calculus - Maxima and Minima

Consider the function given below and pick one or more CORRECT statement(s) from the following choices. f(x) = x³ − (15/2)x² + 18x + 20

The maximum value of the function h(x) = −x³ + 2x² in the interval [-1,1.5] is equal to ________ (rounded off to 1 decimal place).

The function $f(x) = x^3 - 27x + 4$, $1 \le x \le 6$ has

Which one of the following is NOT a correct statement?

At the point x = 0, the function f(x) = x³ has