For each of the following, set up the integral of an arbitrary function $f(x,y)$ over the region in whichever of rectangular or polar coordinates is most appropriate. (Use $t$ for $\theta$ in your expressions.)

(a) The region

With $a =$ , $b =$ ,
$c =$ , and $d =$ ,
integral = $\int_a^b \int_c^d$ $d$ $d$

(b) The region

With $a =$ , $b =$ ,
$c =$ , and $d =$ ,
integral = $\int_a^b \int_c^d$ $d$ $d$