Consider the problem of devising a plan for a kitchen-cleaning robot. a) Write a set of STRIPS-style operators that might be used. When you describe the operators, take into account the following considerations: Cleaning the stove or the refrigerator will get the floor dirty. The stove must be clean before covering the drip pans with tin foil. b) Cleaning the refrigerator generates garbage and messes up the counters. Washing the counters or the floor gets the sink dirty. Write a description of an initial state of a kitchen that has a dirty stove, refrigerator, counters, and floor. (The sink is clean, and the garbage has been taken out.) Also write a description of the goal state where everything is clean, there is no trash, and the stove drip pans have been covered with tin foil.