Consider the widget exchange. Suppose that each widget contract has a market vaule of $0 and a notional value of $100. There are three traders, A, B, and C. Over one day the following trades occur:

A long, B short, 5 contracts

A long, C short, 15 contracts

B long, C short, 10 contracts

C long, A short, 20 contracts

a) what is each traders net position in the contract at the end of the day? (calculate long position minus short positions.)

b) what are trading volume, open interest, and the notional vaules of trading volume and open interest? ( calculate open interest as the sum of net long positions, from your previous answer.)