Chapter 1.1B, Problem 12A

Recall the song $"\text{The Twelve Days of Christmas":}$

On the first day of Christmas my true love gave to me a partridge

in a pear tree

On the second day of Christmas my true love gave to me

two turtle doves and a partridge in a pear tree

On the third day of Christmas my true love gave to me three French hens,

two turtle doves, and a partridge in a pear tree

This pattern continues for $9$ more days. After $12$ days,

a. which gifts did my true love give the most? (Yes, you have to remember the song.)

b. how many true gifts did my true love give to me?