Complex and compound sentences

Thanks for your response to my post.

Q) Identify complex and compound sentences.

1) The horse reared and the rider was thrown. (Compound)

2) Walker quickly, else you will not overtake him. (Complex)

3) The town in which I live is very large. (Complex)

4) I called him, but he gave me no answer. (Compound)

5) I agree to your proposal, for I think them reasonable. (Compound)

6) I went because I was invited. (Complex)

Please also correct the punctuation mistakes if you find any.