Target Practice

Chef has recently taken up marksmanship, but he's not very good at it. Chef has set up a number of targets in a line. When Chef shoots at a target, he may hit the target, but he may instead hit the target to the left, or the target to the right (or if there is no such target, miss completely). Chef knows the probability of his shot going straight, left, or right, and wants to hit each target at le