I need to solve the following but need the step by step instructions using excel. Thanks! To fit a new multiple regression model with dummy variables for weekdays $($not the weekend$),$ and to provide the regression equation $($d $=$ a$*$t $+$ b$1$x$1+$ b$2$x$2+$ b$3$x$3+$ b$4$x$4+$ b$5$x$5+$ b$6$x$6+$ c$),$ along with Adjusted R$2.$ d $=$ Adjusted R$2=$ To use all three models: M$1$: d $=1\mathrm{.}0356$t $+339\mathrm{.}29$ M$2$: d $=0\mathrm{.}7163$t $+116\mathrm{.}7679$w $+315\mathrm{.}0262$ M$3$: $($the one considering weekdays$)$ to predict the demand for seven days ahead $($Mon$,$ Tue, $...,$ Sun$)$ and find the total weekly demand. M$1$ M$2$ M$3$ Mon. Tue. Wed. Thu. Fri. Sat. Sun. TOTAL: Take advantage of the fact that new demand data became available and use this new data to compare the forecasts using MAPE for days $57-63.$ New: M: $311$ T: $341$ W: $357$ Th: $363$ F: $390$ Sa: $490$ Su: $492$ MAPEM$1$: MAPEM$2$: MAPEM$3$: To provide a line chart with the actual demand $($including the new data$)$ and M$2$ and M$3.$