Develop a program using Lex and yuck to implement a simple calculator program to perform addition and subtraction. Before performing the operation, the operands are to be stored in unique variables which can be accessed at any point during the calculation. For example: a = 10; b = 20; c = a + b; print c; d = c - 5; print d; print c; Develop a yuck file for addition and subtraction Develop a Lex file to read the Operator, Operands and Whitespace. Screenshots with explanation Develop a program using Lex and yuck to implement a simple calculator program to perform addition and subtraction. Before performing the operation, the operands are to be stored in unique variables which can be accessed at any point during the calculation. For example: a = 10; b = 20; c = a + b; print c; d = c - 5; print d; print c; Develop a yuck file for addition and subtraction Develop a Lex file to read the Operator, Operands and Whitespace. Screenshots with explanation