$3.$ Two one$-$tenth scale electric radio controlled $($RC$)$ car racing enthusiasts were interested in the theory that a high$-$cost battery with gold plated connectors at a low initial temperature will result in superior performance during a race. They performed and experiment $($shown in the MS Excel file titled battery life data$).$

The response variable $($Y$)$ was the battery life in minutes. The signal factors are:

X$1=$ Battery Cost $($Low or High$)$

X$2=$ Battery Storage Temperature $(6$ degrees C or $25$ degrees C$)$

X$3=$ Connector type $($standard or Gold$)$

Using the battery life data MS Excel file use Minitab to display it in a multi$-$Vari chart and using the chart analyze the significance of the different factors. State what can be concluded from the multi$-$Vari chart.