The questions are in the photo below: I would like them all solved correctly.

6. Show that the function f(:r) 23226a:+8 satisfies the hypothesis of Rolle's Theorem on the closed interval [2, 4]. Find a number c between 2 and 4 such that f'(c) = 0. 7. A car covers 4km in 5 minutes. Using mathematics, explain why the speedometer must read exactly 48km/hr at some point during the trip