You come across a large sum of money in a mattress that you find at Goodwill. You decide to keep the money and invest it in a few portfolios. You put 20% of the money into a
portfolio with a 4% expected return, 60% into a portfolio with a 5.5% expected return, and 20%
into a portfolio with a 6% expected return. What is your total expected return rate as a percent?