The profit on the sale of a bicycle at a bike shop is $35, while the profit on the sale of a tricycle is $21. The owner is interested in making more than $210 in profit per day, and expects to sell at least 8 items per day. The system that represents this situation is b+t>=8 and 35b+21t>210. The graph of the boundary lines is shown below. Which region should be shaded (to form the solution)