TODO $7(10$ points$)$: get$\_$preprocessed$\_$data function

Complete the following the get$\_$preprocessed$\_$data$()$ function which reimplementing each data preprocessing step.

Call the add$\_$bias$()$ function to add the bias column to the training and testing data. Store the output back into and $x_{t}st.$

def get$\_$preprocessed$\_$data$()$:TODO $7\mathrm{.}2$

return x$\_$trn$,$ y$\_$trn$,$ x$\_$tst$,$ y$\_$tst

def TEST$\_$get$\_$preprocessed$\_$data$()$:

X$\_$trn$,$ y$\_$trn$,$ X$\_$tst$,$ y$\_$tst $=$ get$\_$preprocessed$\_$data$()$

print$($f$"$X$\_$trn shape: $\{$X$\_$trn$.$shape$\}")$

print$($f$"$y$\_$trn shape: $\{$y$\_$trn$.$shape$\}")$

print$($f$"$X$\_$tst shape: $\{$X$\_$tst$.$shape$\}")$

print$($f$"$y$\_$tst shape: $\{$y$\_$tst$.$shape$\}")$

print$($f$"$X$\_$trn means:

$\{$X$\_$trn$.$mean$($axis$=0)\}")$

print$($f$"$X$\_$tst means:

$\{$X$\_$tst$.$mean$($axis$=0)\}")$

todo$\_$check$([$

$("$len$($y$\_$trn$)==16512",$ "Training data has incorrect number of data samples."$),$

$("$len$($y$\_$tst$)==4128",$ "Testing data has incorrect number of data samples."$),$

$("($X$\_$trn$[$:$,0]==1).$all$()",$ "The $1$st column of does not seem to be the bias term $($i$.$e$.,$ full of $1$s$)."),$

$("($X$\_$tst$[$:$,0]==1).$all$()",$ "The $1$st column of does not seem to be the bias term $($i$.$e$.,$ full of $1$s$)."),$

$],**$locals$())$

TEST$\_$get$\_$preprocessed$\_$data$()$