Hello I need help with these problems Thanks in advance True or False When f'(x)=0 the function has a

Question

Hello, I need help with these problems. Thanks in advance.

True or False- When f'(x)=0 the function has a

minimum or maximum.

True or False- The sum of two functions that are continuous everywhere is a continuous function.

True or False- Rolle’s Theorem is a special case of the Mean Value Theorem.

True or False- The second derivative of every quadratic function is constant.

Math