Calculate the following:
(a) $i^2\ =$ ,
(b) $i^3\ =$ ,
(c) $i^4\ =$ ,
(d) $i^5\ =$ ,
(e) $i^{66}\ =$ ,
(f) $i^{0}\ =$ ,
(g) $i^{-1}\ =$ ,
(h) $i^{-2}\ =$ ,
(i) $i^{-3}\ =$ ,
(j) $i^{-85}\ =$ .