Give the Myhill graph of your automaton.
(You may use a single node to represent the entire set of symbols of the English alphabet, another to represent the entire set of decimal digits plus underline and another to represent the set of operation symbols. Note that this abbreviation is valid only because the sets are pairwise disjoint.)
b. Give the acyclic paths through your graph.
c. Give the set of simple cycles in your graph. (You do not have to list each rotation of each cycle. One representative for each cycle will do.)