Answer
a) $\mu_1=\mu_2=\mu_3$.
b) There is not sufficient evidence to reject that the means are equal.
Work Step by Step
a) The null hypothesis here says that $\mu_1=\mu_2=\mu_3$.
b)Given: $P=0.051.$
If the P-value is less than the significance level, then this means the rejection of the null hypothesis. Hence: P is more than $α=0.05$, hence we fail to reject the null hypothesis. Thus we can say that there is not sufficient evidence to reject that the means are equal.