Help your friend with a Knapsack to choose the best combination of things in a store room to take in her Knapsack. The Knapsack can at most carry 45 pounds. There are 7 things in the store room. Pencil box, Eraser box, Pen box, Chocolate box, cookie box, box of staplers and electric kettle. Each of them have the following weights respectively (10, 13, 14, 25, 18, 20). Each of them have the following number of dollars of value respectively (10, 12, 14, 15, 17, 20). Show each step and finally write the algorithm clearly. This is not a fractional knapsack problem.