Determine the following limits: (a) 723-522-21 lim +0623 -2.2-40 1 (b) 723-522 lim 21 623-222-4.0 -2.C 1 c (c) 723-522-20 lim 276 6.23-2.2-4.0 1 (d) 723-522-22 lim 200 6.23-222-4.2 11