Identify the type of sampling method.
1.The teacher writes all names of students in a piece of paper and puts it in a box for the graded recitation.
2.The teacher gets he class record and call every 4th name in the list.
3.Every five files out of 500 files will be chosen.
4.There are 20 toddlers, 40 teenagers. 45 middle aged and 55 senior citizens in a certain area. Samples are taken according to the total number of people in the area.
5. All the names of the employees of the company are put in a raffle box.​