Python 3.6- Please correct syntax of this code. And please provide block comments explaining the code step by step. Thanks

def romanNum (r) return 1 return 5 return 10 return 50 return 100 return 500 return 1000 if (rV if (r 'X' ) : if (r == 'L' ): 10 if (r =- 'D'): 12 13 14 15 16 17 18 19 20 21 if (r == 'M' ); def convertRtoD(roman) decimal 23 2 4 25 26 27 28 29 30 31 32 while(i