What counts as GDP (1)? By how much does GDP rise in each of the follow- ing scenarios? Explain. (a) You spend $5,000 on college tuition this semester. (b) You buy a used car from a friend for $2,500. (c) The government spends $100 million to build a dam. (d) Foreign graduate students work as teaching assistants at the local university and earn $5,000 each