With respect to the Boston housing data set, answer the following questions using R software. You must provide answer, R codes and the results of analysis in the solution document.

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$1.$ Apply str$()$ and summary$()$ commands and display the findings. What is the range of$$ Tax and Age. $(2$ marks$)1.$ CAT.MEDV is the median value of homes: $0=$ value $<$ $$30000$; $1=$ value $>$ $$30000.$ Change this variable to a $2$ level categorical $($factor$)$ variable and save in the dataset. Demonstrate R codes and their results $(1$ mark$).$

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$2.$Generate a training with $400$ rows and a test set with $106$ rows from the given dataset $(2$ marks$)$