stock market and treasury bill.

returns for 5 yr period

stock market return % t bill return and %

2013 34.60 0.17

2014 14.30 0.17

2015 -4.20 0.17

2017 15.60 0.04

2017 24.70 0.06

what was the risk premium on common stock each yr?

what was average risk premium ?

what was the standard deviation of the risk premium? ( ignore that the estimation is from a sample of data)