(a). 1

(b). 31/5

(c). 41/25

(d). 21/25

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Option: a is the correct answer.

(a) 1

Step-by-step explanation:Let the input of Feynman be denoted by i and it's output be denoted by f.Now, it is given that:

Feynman, produces output, that is 5 times its input followed by an increase of 2.

i.e. the equation that will be formed using this information is:

Also, it is given that:The output of Feynman feeds into Maxwell.

Let the output of Maxwell be denoted by m and it's input is f.

Maxwell, produces output, that is 5 times its input followed by a decrease of 2.

This means that the equation that will be formed using this information is:

Now, we put the value of f from equation (1) into equation (2)

i.e.

If the output of Maxwell is: 33

i.e.

Then

Hence, the input of Feynman is: 1

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