One college states that the number of men, $M$, and the number of women, $W$, receiving bachelor degrees $t$ years since $1980$ can be modeled by the functions $M(t)=526-t$ and $W(t)=474+2t$ respectively. Let $N$ be the total number of students receiving bachelors degrees at that college $t$ years since $1980$. **Write a formula for $N(t)$ in terms of $M(t)$ and $W(t)$.** $\qquad N(t)=$ [[☃ expression 3]] **Write a formula for $N(t)$ in terms of $t$.** $\qquad N(t)= $ [[☃ expression 4]]