Hello khalidkilo,
The short answer is that they are all about the same difficulty. If you have had any past experience in any one of these areas before university (such as a local high-school course), then you will find these a little bit easier.
Most of these first-year courses deal with fundamentals. You will usually need to perform much memorization of terms, and perform many of the 'example' exercises to become more accustomed to the questions that will be asked during an exam.
I wish you well!
Eugene