1-An investor earned an arithmetic average return over 4 years of 12.8%. The first year's return was 13.3%, the second year's return was -4.40%, the third year's return was 22.9%. What was the fourth year's return?

2-

An investor earned a geometric average return over 4 years of 14.00%. The first year's return was 14.50%, the second year's return was -2.00%, the third year's return was 26.50%. What was the fourth year's return?

3-

Suppose you have $5,300 invested in a stock portfolio in October. You have $3,100 invested in Stock A, $1,600 in Stock B and $600 in Stock C. The HPR for the month of September for Stock A was 2.1%, for Stock B the HPR was -3.15% and for Stock C the HPR was 2.4%. What was the average HPR for the portfolio for the month of October?