Navigation functions 1 Consider the following grid environment and let the cell marked as rg be the goal cel. Assume the planning graph associated with the grid includes the standard four actions where allowed, similarly to what presented in the lecture notes, and let the black cells be untraversable. Define a navigation function : V R20 for each cell/vertex in the grid. You can write the value of the value function directly in the grid. rg Navigation functions 1 Consider the following grid environment and let the cell marked as rg be the goal cel. Assume the planning graph associated with the grid includes the standard four actions where allowed, similarly to what presented in the lecture notes, and let the black cells be untraversable. Define a navigation function : V R20 for each cell/vertex in the grid. You can write the value of the value function directly in the grid. rg