1. Answer the following questions regarding permutations andcombinations.
How many different 5-digit octal numbers are there which do notcontain the digit 0?
How many different 5-digit octal numbers are there which do notcontain the digit 0 and in which all digits are different?
How many 5-digit octal numbers are there which do not containthe digit 0 and where the third digit is an odd number and the lastdigit and even number?
How many different combinations of three 5-digit octal numbersand two 3-digit hexadecimal numbers are there where, in allnumbers, all digits are odd and where all 5 numbers are different?(for a hexadecimal number, consider 1,3,5,7,9,B,D,F to be odd)
