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A coefficient is a number before a variable. (for example, 12d)
A variable is a letter (for example, a)
A constant is a number with no variables (not 6s, but 6)
Let's identify the coefficients & the constants here.
We have the expression

And we know that a coefficient is a number before a variable.
So we know the coefficient (6)
Now, a constant is a number with no variables multiplied by it (or divided by it)
Hence, the answer is

Hope everything is clear.
If you have any questions, please comment.
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