A is correct. Please help with B and also state whether or not Gautney should invest in this security.

B. J. Gautney Enterprises is evaluating a security. One-year Treasury bills are currently paying 5.0 percent. Calculate the investment's expected return and its standard deviation. Should Gautney invest in this security?

Probability	Return
0.05	6	%
0.45	3	%
0.45	6	%
0.05	10	%

a.The investment's expected return is 4.254.25%. (Round to two decimal places.)

b. The investment's standard deviation is ___%. (Round to two decimal places.)