9) - Show that the variance of an equally weighted portfolio is: Var(R.) = * (Average variance of individual actions) +(1-5) (Average covariance between actions) * Note: Start from the definition of the Variance of the Performance of a Portfolio, and detail the procedure (by hand), both for the formulas and for the resolution. 9) - Show that the variance of an equally weighted portfolio is: Var(R.) = * (Average variance of individual actions) +(1-5) (Average covariance between actions) * Note: Start from the definition of the Variance of the Performance of a Portfolio, and detail the procedure (by hand), both for the formulas and for the resolution