Derivative of (4e) ^x

we are given the expression (4e) ^x and is asked to derive the expression. we distribute first the equations resulting to 4^x e^x = y. using the rule of products,

y = 4^x e^xy' = 4^x ln 4 e^x + 4^x e^x

The final answer is y' = 4^x ln 4 e^x + 4^x e^x