2. Compute the following limits. Each limit is worth 5 points. (a) lim x - 3x - 4 x+1 (b) lim = [(h -4)2 - 16] = (c) lim (x - 5)(3 -x) x-+6+ (x-6)(x- 1) = lim (x -5) (3-x) x-+6- (x -6)(x - 1) X4 - 16 d) lim X-+2 x-2 (e) Find c= so that lim *+cx- x-C= 3. +1 .x2+2x-3