Use the monthly returns of the 5 companies you chose in the previous question to look at the return on an equally weighted portfolio of the 5 stocks (that is, a portfolio with equal investment in each stock each month). The portfolio rate of return each month is the equal-weighted average of the stocks’ rates of return. Use Excel to calculate the portfolio’s average return and standard deviation. Compare the portfolio statistics that of those of the stocks. What evidence of portfolio diversification do you find?