Firefighters work a $24-$hour shift at Station $1$ in Edmond. Some start at noon each day, while others begin their shift at midnight. As shown in the following table, a minimum number of firefighters should be on duty for each of the half days.

$\backslash$table$[[,$Monday,Tuesday,Wednesday,Thursday,Friday,Saturday,Sunday$],[$Morning$,2,4,4,4,5,8,8],[$Afternoon$,3,4,4,4,8,8,6]]$

How many constraints are there in this problem if it is modeled using linear programming?

a$.14$

b$.7$

C$.16$

d$.18$