Represent decimal integer values in binary, octal, and hexadecimal number systems and utilize in calculations.Write and test a function that counts and returns the number of bits set to 1 in a positive integer. For example, countBits(12) should return 2 because 12 = 1100. Add code to your countBits method so that it returns both the number of 1 bits in the integer and a string representation of the integer.For example, statement: print(countBits(12)) should display the the following image

Explain every step of the code.

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