Since we already know that we can plug each set of values for *a*, *b*, *c* into . We already found the integral; what's left is algebra. (a) We substitute the values *a* = 1, *b* = 2, *c* = 3 to get (b) We plug in *a* = 2, *b* = -1, *c* = 5 to get (c) We plug in *a* = -1, *b* = 1, *c* = 1 to get |