(1) (10 points each) Find a regular expression for the following languages on = {0,1}: (a) The set of all strings containing 0.1 but not 0.1.0. (b) The set of all strings except the ones with 1.1.1 as a substring. (c) The set {w: na(w) mod 3 > 1} (d) The set{w:na(w) mod 3 > nh(w) mod 3}