Reading a partially filled ANOVA table

The values of $a$, $b$ and $c$ in the following ANOVA table

$$\begin{array}{c|ccc} \text{Source} & \text{d.f.} & \text{Ss} & \text{Mss}\\\hline \text{Treat} & 4 & b & -\\ \text{Error} & a & 0.35 & c\\ \text{Total} & 29 & 1.25 & - \end{array}$$

are: