Answer
The curve must be contained in the range $f(t) \in [1,4]$ and $g(t) \in [2,3]$.
Work Step by Step
From the problem statement, we see that $1 \leq x \leq 4$ and $2 \leq y \leq 3$. So the curve must be contained in the range $f(t) \in [1,4]$ and $g(t) \in [2,3]$.