$1.$ Calculate the expected value, standard deviation, and the coefficient of variation of QQQ$$s sales for the current year.

$2.$ Calculate the expected value, standard deviation, and the coefficient of variation of QQQ$$s ROE with the sales figures for the current year.

$3.$ Evaluate the effect of the current sales volatility on the company$$s business risk.

$4.$ Calculate the expected value, standard deviation, and the coefficients of variation of QQQ$$s sales and ROE with the sales forecast for next year.

$5.$ Calculate the value of equity after the new debt issue if QQQ decides to buy back stocks with the new debt issue. Assume QQQ does not have any short$-$term investments.

$6.$ Determine how the expected decrease in sales volatility next year will affect the company$$s business risk.

$7.$ Calculate the expected value, standard deviation, and the coefficients of variation of QQQ$$s current sales and ROE with $30$ percent financial leverage.

Evaluate the effect of using $30$ percent financial leverage on the company$$s current total risk.

$8.$ Calculate the expected value, standard deviation, and the coefficients of variation of next year$$s sales forecast and ROE with $30$ percent financial leverage. Evaluate the effect of using $30$ percent financial leverage on the company$$s total risk next year.