For the following, state whether the indicated function is or is not continuous at 3; if not, tell why not. a) g(t) = Vt - 3 b) f(x) = 21-7: T-3 c) g(t) = 1 2 - 9 , if t 3 Determine for which of the following functions g defined below, we can redefine g(a) so as to make g continuous at a. When this can be done, give the corresponding redefinition. 2x - 3, if x 1 +1, ifx -1