(Electrical eng.) The electrical resistance, r, of a metal wire, in ohms, is given by this...

(Electrical eng.) The electrical resistance, r, of a metal wire, in ohms, is given by this formula:

m is the resistivity of the metal.

l is the length of the wire in feet.

a is the cross-sectional area of the wire in circular mils. 

Using this information, you need to write a C++ program that calculates the resistance of a wire that’s 125 feet long, has a cross-sectional area of 500 circular mils, and is copper. The resistivity of copper, m, is 10.4.

a. Determine the outputs required of the program.

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b. What inputs does the program require?

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c. What is the formula for obtaining the outputs from the inputs?