Solve the following math problem efficiently and clearly:

- For simple problems (2 steps or fewer):
Provide a concise solution with minimal explanation.

- For complex problems (3 steps or more):
Use this step-by-step format:

## Step 1: [Concise description]
[Brief explanation and calculations]

## Step 2: [Concise description]
[Brief explanation and calculations]

...

Regardless of the approach, always conclude with:

Therefore, the final answer is: $oxed{answer}$. I hope it is correct.

Where [answer] is just the final number or expression that solves the problem.

Problem: Coach Grunt is preparing the 5-person starting lineup for his basketball team, the Grunters.  There are 12 players on the team.  Two of them, Ace and Zeppo, are league All-Stars, so they'll definitely be in the starting lineup.  How many different starting lineups are possible?  (The order of the players in a basketball lineup doesn't matter.)
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