(28 points) 7. Evaluate each of the limits listed below. Justify your answers by identifying the results of Units 2 and 3 you apply in each case. If a limit does not exist, explain why. sin( 7 - x) a. lim Vx- - x+1 13 - 3x- + 4x -12 b. lim x-3 3x- - 7x - 6 C. lim cos (xx + 1)(3 - x-) x-700 X - 1 x sin(3x) d. lim x->00 x-+1 x+1 e. lim sin + x2 f. lim Vx+1-1 sin (3x) g. lim x->01 - cos(2x)