Strawberries contain about 15 wt% solids and 85 wt% water. To make strawberry jam,crushed strawberries and sugar are mixed in a 45:55 mass ratio, and the mixture is heated to evaporate water until the residue contains one-third water by mass. Draw and label a flowchart of this process, and, calculate how many pounds of strawberries are needed to make a pound of jam?