Exercise $4\_$ch$8\_$no$1($Descriptive statistics of two stocks$)$: Here is the stock price history of $$High Tech and Low Tech$$ corporations.

Calculate:

a$.)$ The annual returns for each stock.

b$.)$ The mean $($average$)10-$year return for the period for each firm. Which stock has the higher average return?

c$.)$ The variance and the standard deviation of returns, for the period of $10$ years for each firm. Which stock is riskier?

d$.)$ The covariance and correlation of the returns for each firm. Use two formulas to compute the correlation: The Excel function Correl and the definition $(,)=(,)$

e$.)$ If you had to choose between the two stocks, which would you choose? Explain briefly.