In each case, find the distance between u and v.
(a) u = (3, -1, 2, 0), v = (1, 1, 1, 3)
(b) u = (l, 2, -1, 2), v = (2, 1, -1, 3)
(c) u = f1v = g in C[0, 1] where f(x) = x2 and g(x) = 1 - x
(d) u = f v = g in C[-π, π] where f(x) = 1 and g(x) = cos x