Evaluate IBM, HP and S&P $500$ index on a risk return basis. Compute expected return and standard deviations using equations $7\mathrm{.}2$ and $7\mathrm{.}3$ in your text, assuming all outcomes are equally likely. You may use the formulas stdev.p to check your work. Assume the risk$-$free rate is $20\%.$ Which investment is best if evaluated on the tradeoff between risk and return? Rank the investments, $1($best$)$ through $3($worst$).A$ p$$al example is provided below for IBM.