Paul and Tom have three children and they all are Australian Residents. Three children are Cathy $($aged $15),$

Jacinta $($aged $13)$ and Toby $($aged $10),$ all of whom are full

time students and living with them. Jacinta and Toby have

no income, but Cathy has earned $$3,556$ during the year.

In addition, Paul pays child support for his son, David,

who lived with Peter's ex$-$partner and is a full time

student aged $17.$ David has had no income during the

year.

How many children will Paul include at Item M$1$ Label Y

of the tax return $($Financial Year $2022-2023)?$