$($Answer questions $7$ and $8$ after you watch the STATQUEST video "Linear Regression in R$,$ Step$-$by$-$Step" linked above and revise the data as described above.$))$

Using the revised data, what is the final Multiple R$-$squared? $($The Multiple R$-$squared was $0\mathrm{.}6133$ in the old data and in the video$).$