$1.)$ The Excel file Portfolio Weights Data contains information about two portfolios.

a$.$ Using Matrix Algebra compute the portfolio asset weights for Portfolio C if Portfolio C has $85\%$ of its funds invested in Portfolio A and $15\%$ of its funds invested in Portfolio B$.$

Using EXCEL$$s Data Table Feature, create a one$-$way data table to compute the Portfolio C asset weights by varying the proportion of funds invested in Portfolio A from $1\mathrm{.}25$ to $+1\mathrm{.}25$ in increments of $0\mathrm{.}25.$Portfolio C will consist of the appropriate proportion of funds invested in Portfolio A and the remainder of the funds invested in Portfolio B$.$