Calculate the historical risk premium for T-bills, T-bonds, corporate bonds, small company stocks, and large-company stocks, given that their historical average returns are 3.7%, 5.9%, 6.4%, 16.5%, and 11.7%, respectively. I have the answers which are listed below in the table, but I don't understand how they solved to find the risk premium. Can you please be as detailed as possible so I understand how to arrive at the answers? Thank you!

	Average Returns	Risk Premium
Large Stock	11.70%	8.00%
Small stocks	16.50%	12.80%
Corporate bonds	6.40%	2.70%
Long term T-Bonds	5.90%	2.20%
T-bills	3.70%	0.00%