Activities $A$ to $K$ are required to complete a project. The time estimates and the immediate predecessors of these activities are given in the table. If the project is to be completed in the minimum possible time, the latest finish time for the activity $G$ is  _______________ hours.

$$\begin{array}{|c|c|} \hline \text{Activity} & \text{Time (hours)} & \text{Immediate predecessors} \\ \hline \text{A} & 2 & – \\ \hline \text{B} & 3 & – \\ \hline \text{C} & 2 & – \\ \hline \text{D} & 4 & \text{A} \\ \hline \text{E} & 5 & \text{B} \\ \hline \text{F} & 4 & \text{B} \\ \hline \text{G} & 3 & \text{C} \\ \hline \text{H} & 10 & \text{D, E} \\ \hline \text{I} & 5 & \text{F} \\ \hline \text{J} & 8 & \text{G} \\ \hline \text{K} & 3 & \text{H, I, J} \\ \hline \end{array}$$

1. $5$
2. $10$
3. $8$
4. $9$