Asset	Past 5 years	Past 10 Years	Past 50 years
Stock market	9.5%	5.6%	6.3%
Long term bonds	7.2%	3.3%	4.2%
Short term treasuries	1%	2.1%	3.1%

Given the information above

Current yield on a 10-year to maturity bond if 0.8% and for short term treasury is 1.25%. The beta of a company 'ABC' estimated from regression of monthly returns over the past 5, 10 and 50 years is (in correspond) 0.6, 1.3, 1.8.

Question1: What is estimation of the equity risk premium using long-term bonds as the riskless asset?