EF234 Compound sentences

1. Jim cut the grass, and Ed weeded the garden.
Jim cut the grass, but Ed weeded the garden. ??
Jim cut the grass, so Ed weeded the garden.
Jim cut the grass; also, Ed weeded the garden.
Jim cut the grass; then, Ed weeded the garden.

2. I was very tired last night, so I went to bed early.
I was very tired last night; therefore, I went to bed early.

,so OR ;therefore, WHICH ONE DO YOU LIKE MORE?

4. The sun is shining, but it is still cold.

The sun is shining; however, it is still cold.