Alfie has a monthly budget of 160 to be spent on T-shirts and trainers. He could afford to buy two T-shirts and one pair of trainers. He could also buy eight T-shirts. In each case, he would be spending his entire monthly allowance. a) Calculate the price of a T-shirt and the price of a pair of trainers. Write down Alfie's budget equation and draw the corresponding budget line. Mark the two consumption bundles mentioned above. In your graph, clearly label the axes, the budget line, and calculate the coordinates of the points of intersection of the budget line with each axis. Interpret each of those points. b) Discuss how Alfie's budget set would change if his income doubles. Show the relevant changes graphically