Which TWO of the following are true of the learning set procedure? 1:The animals learns to focus on classes of cues that are inaccurate predictors of reward 2:In the win-stay, lose-shift strategy, the animal learns to persist with a choice that yields food, but shift to the other object if it does not 3:In the learning-set procedure, all stimuli and associations have equal effect on the animal’s behaviour 4:The occurrence of reward can be regarded as a stimulus that can enter into associations or acquire discriminative control over an instrumental action