Feature Scaling

Since most of our data has already been scaled, we should scale the columns that are not yet scaled (Amount and Time).

We shall use StandardScaler to scale the "Amount" column and the "Time" column.

INSTRUCTIONS

From sklearn.preprocessing import StandardScaler

from sklearn.preprocessing import StandardScaler

Get StandardScaler() instances.

scaler_amount = StandardScaler()
scaler_time = StandardScaler()

Use fit_transform of scaler_amount on the X_train['Amount'] and save the transformed values in X_train['normAmount'].
```
X_train['normAmount'] = scaler_amount .<< your code comes here >>(X_train['Amount'].values.reshape(-1, 1))
```

Use transform of scaler_amount on the X_test['Amount'] and save the transformed values in X_test['normAmount'].

X_test['normAmount'] = scaler_amount .<< your code comes here >>(X_test['Amount'].values.reshape(-1, 1))

Use fit_transform of scaler_time on the X_train['Time'] and save the transformed values in X_train['normTime'].
```
X_train['normTime'] = scaler_time .<< your code comes here >>(X_train['Time'].values.reshape(-1, 1))
```

Use transform of scaler_time on the X_test['Time'] and save the transformed values in X_test['normTime'].

X_test['normTime'] = scaler_time .<< your code comes here >>(X_test['Time'].values.reshape(-1, 1))

Drop Time and Amount columns from X_train and X_test.

X_train = X_train.drop(['Time', 'Amount'], axis=1)
X_test = X_test.drop(['Time', 'Amount'], axis=1)

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