I got the first part right, but not the second one I need help
Verify that the Mean Value Theorem can be applied to the function f(x) shown below on the interval [−5,5]. Then apply the theorem by answering the following questions.
a) Find the average or mean slope of the function on the interval [−5,5].
Verify that the Mean Value Theorem can be applied to the function f(x) shown below on the interval [−5,5]. Then apply the theorem by answering the following questions.
f(x)=4x^3−2x
a) Find the average or mean slope of the function on the interval [−5,5].
Answer: 98
b) Find all values of c in the open interval (−5,5) such that f′(c) is equal to this mean slope. Enter multiple values as a comma-separated list, or enter none if no such values exist.
Answer: