d. What decision should be made? Why? (2 pts.) 3. Helen's rich uncle died and left her a sizable inheritance. She thought about keeping his portfolio of investments just as he had left it since he ended up so rich, but she realized that since he was an old man, he invested in more conservative instruments as he got older. Helen is young and optimistic, so she thought she might try a more aggressive portfolio, particularly investing in new technologies. Her decision alternatives at this point are to keep the portfolio as is (D1), or to invest more aggressively (D2), even though that has greater risk, especially with the COVID pandemic lingering, inflation, and the war in Ukraine. She developed the following payoff table (in $1000s ), with S1 and S2 the state of new technological developments being strong ( S1) or weak ( S2) in the coming year. StrongWeak,KeepportfolioasisInvestaggressivicly507030=20 a. Find the highest return for each state of nature. Show your work. (4 pts.) b. Calculate the regret table below. SHOW ALL WORK TO GET FULL CREDIT. (6 pts.) c. Calculate the minimax regret below. SHOW ALL WORK TO GET FULL CREDIT. (3 pts.) d. What decision should be made? Why? (2 pts.)