How to find the Variance using the Excel, i need to know how to do it with Excel only.

Youve observed the following returns on Crash-n-Burn Computers stock over the past five years: 12 percent, 12 percent, 19 percent, 24 percent, and 10 percent.

a.	What was the arithmetic average return on Crash-n-Burns stock over this five-year period? (Do not round intermediate calculations. Enter your answer as a percent rounded to 1 decimal place, e.g., 32.1.)

Average return

%

b-1	What was the variance of Crash-n-Burns returns over this period? (Do not round intermediate calculations and round your answer to 5 decimal places, e.g., 32.16161.)

Variance