2. C and Flex (25 Points): Finish the following simple flex integer calculator. The user types in integers as their English names from one to te $./ cale one 1 $./ cale one + two 3 $./ cale one + two + three 6 $./ cale two * (three + four) five 70 $./ calc two (three four) five 10 $./ cale eight two 0 $./ calc eight / two 4 Have the generated function yylex() take the following actions for each symbol: 8.1 *_--- This Flex program defines a program that defines an integer ---* *_--- calculator, except that the numbers 1-10 are given as their