Suppose we decide to use simple backtracking search to find a solution to this constraint satisfaction problem. The variable ordering heuristic we use is simply to instantiate the variables in numbered order. The color value ordering heuristic is to consider the color values in the order Gold, Silver, Bronze. You can use any reasonable shorthand to indicate the instantiations (e.g., "1=G" can mean box 1 is instantiated to the gold color).