2. ( 20 pts.) A 3 ton vessel can be loaded with one or more of three items. The following table gives the unit weight, di, in tons, and the unit revenue is thousands of dollars, ri, for item i. The goal is to determine the number of units of each item that will maximize the total return. Because the unit weight dj and maximum weight w are integers, the state xi assumes integer values only. Use dynamic programming to solve this problem. ****Show stages 3 and 2 only****