Question Marks, Cash Cows, Stars, and Dogs?

I am writing a paper on BCG matrix in marketing. I am having trouble coming up with examples of each. I came up with one for cash cow, but I really need to mention several of each in my paper. Pleas help with examples and why they would fall into each category.

Question Marks: Low Market Share / High Market Growth
examples:

Stars: High Market Share / High Market Growth
examples:

Cows: High Market Share / Low Market Growth
examples:
A storage unit facility. Makes lots of money with little effort.


Dogs: Low Market Share / Low Market Growth
examples:

What's your cash cow?

For Dog, how about a local business (named) in your area?

For Question Mark, how about a new chain added to a profitable industry, such as H.H. Gregg to electronics (Gregg is moving into failed Chicago big-box store space)

You figure out the last one, the Star.