please help, stuck on this HW! thanks

Applying the concept of holding period return, what is the return for each of the following investments? Formula Endine Value - Beginnine Value + Cash flower. Dividends or Interest) - Holding Period Return Beginning Value 1. Buy at $25 Sell at $28 Dividends $2 2. Buy at 37 Sell at $31 No dividends 3 Buy at $57 Sell at $56 Dividends $3 4 What is the Expected Return on $50,000 if the cash flow from the investment is as follows: Economy Recession Normal Boom Probability 15% 60% 25% Expected Cash Flow $2,000 $6,700 $10,200 FOCUS