All sequences for this problem are geometric. Give all answers to the nearest thousandth.

If $a_1 = -59$ and $r = 2$, then $a_{13} =$ .

If $b_{18} = 7$ and $b_{49} = 56$, then $b_1 =$ .

If $c_{17} = -20$ and $c_{35} = -45$, then $S_{16} =$ .