Yes it is a big ask. You need to read the rules of the forum, which state that it's expected that a student shows that they have made an effort with what they are asking for help with and show what they have done. Then the members here will give you some guidance. Also, you are not allowed to post more than 2 questions per thread.
In the first three questions, you are told you need to try to solve these DEs by separating the variables. Have you tried this?