Describe the phase shift for the following function:

$y=\cos\left(5x-\frac{\pi}{2}\right)$

• A. $\frac{\pi}{2}$ to the right
• B. $\frac{\pi}{2}$ to the left
• C. $\frac{\pi}{10}$ to the right
• D. $\frac{\pi}{10}$ to the left