help me ,solve this math problem with explaintion how to solve it,aslo show your working please
6 (a) Calculate the number of different 6-digit numbers which can be formed using the digits
0, 1, 2, 3, 4, 5 without repetition and assuming that a number cannot begin with 0. [2]
(b) A committee of 4 people is to be chosen from 4 women and 5 men. The committee must contain at
least 1 woman. Calculate the number of different committees that can be formed. [4]