ANSWER ASAP please!

Joe has a one-year HP.

Mary has a two-year HP.

Mark will hold the stock in a perpetual trust fund.

1. What is the highest price that Joe should be willing to pay for XYZ stock given if he expects that the stock will fetch $40 in one year.

Risk-free rate, Rf = 5%

Expected return on the market, E(Rm) = 10%

The stock beta =1.6

XYZ just paid a dividend of $1.4

Expected growth rate of dividends and of the stock price is a constant 6%.

2. What is the highest price that Mary should be willing to pay?

3. What is the highest price that Mark should be willing to pay?