Nonlinear Functions

A polynomial $f(x) = a(x - r_1)^{m_1}(x - r_2)^{m_2} \cdots$ has degree 7, leading coefficient $-2$, and 3 distinct real zeros at $-1, 2, 5$. If the multiplicity of $x = 2$ is 3 and $x = -1$ is 2, what is the multiplicity of $x = 5$?