The graph below is created by parametric equations of the form $\begin{cases} x(t) &= a\cos(t) + b \\ y(t) &= c\sin(t) + d \end{cases}$. Find the values of $a$, $b$, $c$, and $d$ to achieve the graph:
$a =$
$b =$
$c =$
$d =$

Hint: