Can anyone help me with this pre algebra promblems please

The teacher asks that students with birthdays from July to December go to the chalkboard to work the next problem.
A. convenience
B. stratified
C. random
D. systematic

Identify the sampling method used.
Students sitting at the same lunch table are polled.
A. voluntary response
B. stratified
C. random
D. convenience

A radio station manager chooses 300 people from a mailing list to survey about listening habits. Identify the sample.
A. people who live in the radio broadcast range
B. radio listener
C. people on a mailing list
D. 300 people from a mailing list

Identify the sampling method used.
People whose house number ends with a 1 are polled.
A. stratified
B. random
C. convenience
D. systematic

This isn't the pre-algebra I was thinking of, but I'm pretty sure the answers are:

1 - B
2 - D
3 - D
4 - B