A teacher instructed her class to take any number and perform a series of computations using that number. The teacher was able to tell each student's original number by subtracting 1 from the student's answer. Create similar instructions for students so that the teacher needs to do only the following to obtain the student's original number:
a. Add 1 to the answer.
b. Multiply the answer by 2.
c. Multiply the answer by 1.
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