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: The graph below shows the number of home runs in April for the top hitters in the league. What is the mean (average) number of home runs hit by these players?

[asy]
draw((0,0)--(0,7)--(24,7)--(24,0)--cycle);
label("KEY:",(3,5));
fill((3,2.5)..(3.5,2)..(3,1.5)..(2.5,2)..cycle);
label("- one(1) baseball player",(14,2));
[/asy]


[asy]
draw((18,0)--(0,0)--(0,18));
label("6",(3,-1));
label("7",(6,-1));
label("8",(9,-1));
label("9",(12,-1));
label("10",(15,-1));
fill((3,.5)..(3.5,1)..(3,1.5)..(2.5,1)..cycle);
fill((3,2)..(3.5,2.5)..(3,3)..(2.5,2.5)..cycle);
fill((3,3.5)..(3.5,4)..(3,4.5)..(2.5,4)..cycle);
fill((3,5)..(3.5,5.5)..(3,6)..(2.5,5.5)..cycle);
fill((3,6.5)..(3.5,7)..(3,7.5)..(2.5,7)..cycle);
fill((3,8)..(3.5,8.5)..(3,9)..(2.5,8.5)..cycle);
fill((6,.5)..(6.5,1)..(6,1.5)..(5.5,1)..cycle);
fill((6,2)..(6.5,2.5)..(6,3)..(5.5,2.5)..cycle);
fill((6,3.5)..(6.5,4)..(6,4.5)..(5.5,4)..cycle);
fill((6,5)..(6.5,5.5)..(6,6)..(5.5,5.5)..cycle);
fill((9,.5)..(9.5,1)..(9,1.5)..(8.5,1)..cycle);
fill((9,2)..(9.5,2.5)..(9,3)..(8.5,2.5)..cycle);
fill((9,3.5)..(9.5,4)..(9,4.5)..(8.5,4)..cycle);
fill((15,.5)..(15.5,1)..(15,1.5)..(14.5,1)..cycle);
label("Number of Home Runs",(9,-3));
picture perpLabel;
label(perpLabel,"Number of Top Hitters");
add(rotate(90)*perpLabel,(-1,9));
[/asy]
user