Final answer:
The coefficients in the expression are 6 and -1/3.
Step-by-step explanation:
The coefficients in the given expression are 6 and -1/3.
To identify the coefficients, we look for the constants that are multiplied by the variables. In this expression, 6 is multiplied by 'a' and -1/3 is multiplied by 'b'. Therefore, the coefficients are 6 and -1/3.