The initial reaction rate for the elementary reaction $2A+B4C$ was measured as a function of temperature when $[A]=2M$ and $[B]=1\mathrm{.}5M.$

$\backslash$table$[[-r_A(\frac{mo{l}^3}{d{m}^{3}s}),0\mathrm{.}002,0\mathrm{.}046,0\mathrm{.}72,8\mathrm{.}33],[T(K),300,320,340,360]]$

a$.$ What is the activation energy?

b$.$ What is the frequency $($or pre$-$exponential$)$ factor?