Using the following data calculate a and $b$ and graph CAL

$\backslash$table$[[$Expected return of market portfolio,$0\mathrm{.}15],[$Normal Standard deviation of market portfolio,$0\mathrm{.}25],[$Risk free rate of return,$0\mathrm{.}50]]$

a$.$ Assume further the investor A invests $60\%$ of his$/$her money in risk free asset, $40\%$ in market portfolio. What is the expected return and standard deviation of this portfolio? What do we call this portfolio?

b$.$ In addition to data above, let us assume that another investor B borrows $100$ and invests $200$ in the market portfolio. What is the expected retum and standard deviation of this portfolio?

c$.$ Show the positions of these two investors on CAL