Can anyone help me with these 6 recurrence questions? I'm really confused with what to do. Please explain what you did, I need to learn how to solve this with the Master Theorem, not simply get the answers, so please show all your work.

Solve the following recurrences using the Master Theorem: T(n)-2T(n/2) + n4 T(n) = T(in/10) + n * T(n)-16T(n/4) + n2 T(n)=7T(n/3) + n2 T(n) = 7T(n/2) + n2 T(n) =2T(n/4) + ym