how would i solve this?

Widget Manufacturing, Inc. has an average return of 12.8%, a beta of 1 , and a standard deviation of 52.3%. You know the risk-free rate is 1.6%, the market return is 11.5%, and the market standard deviation is 25.8%. What is the M2 of Widget Manufacturing, Inc.? Enter your answer without the % symbol (so if your answer is 1.2%, type - 1.2 )