For the Equation for a Normal Distribution Shown, What Are $f(x)=\frac{1}{\sqrt{32 \pi}} e^{\frac{-(x-40)^{2}}{32}}$

For the equation for a normal distribution shown, what are the mean and standard deviation?
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$f(x) =\frac{1}{\sqrt{32 \pi}} e^{\frac{-(x-40) ^{2}}{32}}$

A) Mean = 40, variance = 4
B) Mean = 40, variance = 8
C) Mean = 40, variance = 16
D) Mean = 40, variance = 24