In the decimal system (base 10), a natural number is represented as a sequence dndn1 . . . d0 of (decimal) digits, each of which is in the range 0..9. The value of the number is d0 100 + d1 101 + + dn 10n . Similarly, in the binary system (base 2), a natural number is represented as a sequence bnbn1 b0 of (binary) digits, each of which is 0 or 1. The value of the number is b0 2 0 + b1 2 1 + + bn 2 n . For example, the value of the number whose binary representation is 101 is: 1 2 0 + 0 2 1 + 1 2 2 = 1 + 0 + 4 = 5. (i) Without using any built-in functions for converting numbers, write a function that takes as input the binary representation of a positive integer n and returns its decimal representation. (ii) Without using any built-in functions for converting numbers, write a function that takes as input the decimal representation of a positive integer n and returns its binary representation. please use basic python programming