Answer
$F_0=5.01$ with a P-value $\ltα$.
There is enough evidence to conclude that there is a linear relation between at least one of the explanatory variables with Miles per Gallon.
Work Step by Step
$H_0: β_1=β_2=β_3=0$ versus $H_1: at~least~one~β_i\ne0$
With the results from item (b):
$F_0=5.01$ with a P-value $=0.026\ltα=0.05$. Reject the null hypothesis.
