Question 9 [20] Consider the following blocks-world problem There are three blocks, named a b and c, and three places, numbered 1, 2 and 3 The initial state is given by the following list [clear (b), clear(c),clear(3),on(a,l), on (b, a), onc,2)) Use the following assumptions in your answers to the questions given below The add-list for action move (X, From, To) is (on (X, To), clear (Fron) 1 The deletc-list for action move (x, From, To) 15 (on (X, From),clear (To). The preconditions for action move (x, From, To) are (clear (X),clear (To), on (X, From)]. Always select the leftmost goal in the gcal list (VI) Note that we follow the convention used by Bratko After an action has been completed, the elements in the state space (if present) have the following sequence (clear(a), .clear(c),clear(1), .clear(3),on (a,?), ,on(c,?) 1 91 Give the sequence of moves that a simple means-ends planner will generate to achieve the goal on(a,2) from the given initial state Give the preconditions of each proposed action as well as the subgoal that each action in the plan achieves (10) 92 Give the sequence of moves that a means-ends planner with goal protection will generate to achieve the goal on(a, 2) from the given initial state Give the preconditions of each proposed action and the subgoal that each action in the plan achieves, as well as the protected goals at each stage