When constructing the efficient frontier with multiple risky assets,$$we first program a 'template' column.$$In that column,$$we calculate the risk premium,$$standard deviation,$$and Sharpe ratio for$$a given vector of portfolio weights,$$which Excel function do we use to calculate the risk premium?$$

Group of answer choices

MMULTI$(,)$

AVERAGE$()$

SUMPRODUCT$(,)$

A$1*$B$1+$A$2*$B$2+$A$3*$B$3+...+$AN$*$BN