Transform the sentences according to the instructions given in the bracket:
1. The boy was very hungry, so he ate the whole cake, (change into a simple sentence)
2. Though the lizard made several attempts, it could not catch the spider. (change into a compound sentence)
3. The lady was very ill. She could not go to the office. (Change into a complex sentence)
4. The doctor made several attempts. He could not save the old man. (Change into a simple sentence)
5. She was bold. So, she became an astronaut. (Change into a simple sentence)