Bond A is a discount bond with face value of $100 and maturity of 10 years.

Bond B is a discount bond with face value of $100 and maturity of 2 years.

Suppose the yield to maturity is currently 4%.

Over the course of the year, prevailing yields are expected to change according to the table below:

Next year's yield	Probability
3%	0.33
4%	0.34
5%	0.33

Calculate the expected return of bond A.

Calculate the standard deviation of returns for bond A

Calculate the standard deviation of returns forbond B