Download and read the "Real estate valuation data set.xlsx$"$ dataset. $3.$ Continue from question $2,$ use leave$-$one$-$out validation and five fold cross validation

and report the model performance. Compare the three evaluation methods and

suggest which one is more reliable.

$4.$ Continue from question $2,$ apply L$1$ and L$2$ regularization on the linear regression

model developed using the same training set. Compare the performance and

indicate key findings