Use classification techniques to classify Credit$-$Approval Decisions with the data in the Excel

spreadsheet $3.$ Credit Approval Decisions$.$

$1)$ Explain the purpose of classification.

$2)$ How is classification performance measured?

$3)$ Using k$-$NN for classifying a new record $($Record $51,$ set k$=5).$

$4)$ Using Discriminant Analysis for classifying more new records $($Record $51-55)$