a$-$ZOOZ Power Ltd company is in a very mature state in their product life cycles. ZOOZ is expected to pay a dividend in year $1$ of $$2\mathrm{.}00,$ a dividend of $$1\mathrm{.}50$ in year $2,$ and a dividend of $$1\mathrm{.}00$ in year $3.$ After year $3,$ dividends are expected to decline at a rate of $1\%$ per year. An appropriate required rate of return for the stock is $10\%.$ What is the fair value of the stock using the multiple growth model?$$Is the stock overvalued or undervalued if it is sold in the market for $$2?$ b$-$ You hold a diversified portfolio consisting of a $$5,000$ investment in each of $20$ different common stocks. The portfolio beta is equal to $1\mathrm{.}15.$ You have decided to sell one of your stocks, a lead mining stock whose beta is equal to $1\mathrm{.}0,$ for $$5,000$ net and to use the proceeds to buy $$5,000$ of stock in a steel company whose beta is equal to $2\mathrm{.}5.$ What will be the new beta of the portfolio? How can you decrease the beta of any portfolio?