This one has got me totally stumped:

I've been told to find the values of a and b so f(x) is continous everywhere. I'm not exactly sure of the method used to find the two integers in order to make the piecewise statement true, and therefore continous.

Also, I have these 2 to do as well:

I'll probably kick myself whenever I figure the bottom two out. I recall the process being fairly simple, but when you haven't slept in about a day and a half, your brain starts to become a little fuzzy.

Some help on these would be great... I've been working on this worksheet since 12:00.