Modify your C program so that it can also accept a keyword subtract, that will subtract the second number from the first and print the result. For example: Test Result ./calculator USAGE:./calculator add [num1] [num2] ./calculator ad 2 3 unrecognised option: ad ./calculator add 2 3 ./calculator add 2 USAGE: ./calculator add [num1] [num2] ./calculator ad 2 USAGE:./calculator add [num1] [num2] /calculator subtract 5 2 3 ./calculator subtract 2 5 3 Answer: (penalty regime:
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