Read and attempt questions below

Your uncle, David, a retiree aged $67,$ has approached you for advice on which stock to invest in$.$ His friend has suggested that he invests in stock of FirstRand Namibia Limited, $($stock Code $$FNB$),$ Mediclinic International plc$.($stock code $$MEP$),$ and Oceana Group Ltd$.($Stock Code $$OCG$).$ The returns on various stocks depend of the economic conditions prevailing in post$-$Covid Namibia.

Economic conditions may be classified into excellent, good and bad. The impact on performance of stock depend on the industry in which the company is$.$ Market indications are there is a $30\%$ probability the economic conditions will excellent, and a $50\%$ chance conditions will be good. The likely returns of each of the stock of the above three companies under different excellent, good and bad states of economic conditions are FirstRand Namibia $$FNB$$ stock $25\%,11\%,$ and $-5\%,$ Oceana $$OCG$$ stock $20\%,10\%,$ and $2\%,$ and Mediclinic $$MEP$$ stock $15\%,7\%,$ and $-3\%$ respectively. David has a capital budget of N$$500,000$ which he plans to spend all in one stock investment or in a portfolio made up of $30\%$ Oceana stock, $25\%$ Mediclinic stock, and rest on FNB stock.

$2\mathrm{.}2$ Based on the question scenario, calculate the following:

a$.$ Return on FNB stock

b$.$ Risk associated with Oceana stock

c$.$ Portfolio return

d$.$ Portfolio risk

Use column to show all the calculations