Answer
The answers are:
\begin{align}
2a^5: &\color{red}{\text{Coefficient is 2 and Degree is 5}}\\
a^2: &\color{red}{\text{Coefficient is 1 and Degree is 2}}\\
8a: &\color{red}{\text{Coefficient is 8 and Degree is 1}}\\
10: &\color{red}{\text{Coefficient is 10 and Degree is 0}}
\end{align}
Work Step by Step
To determine the coefficient of a term, identify the part of the term which is the constant factor (usually a number).
To determine the degree of a monomial, identify the number of variable factors in the monomial.
\begin{align}
2a^5: &\color{red}{\text{Coefficient is 2 and Degree is 5}}\\
a^2: &\color{red}{\text{Coefficient is 1 and Degree is 2}}\\
8a: &\color{red}{\text{Coefficient is 8 and Degree is 1}}\\
10: &\color{red}{\text{Coefficient is 10 and Degree is 0}}
\end{align}