Use put call parity to determine the size of the arbitrage profit AT TIME T=3/12 arising from the following situation. All options are European. So = $19.4 T = 3/12 (for both the call and the put) K = 20 (for both the call and the put) c = $3.21 p = $2.58 r = 10% (cont. comp. annual rate) Dividend = $1 in one month (required precision 0.01 +/- 0.01)

CORRECT ANSWER IS 1.77, I need steps to solve this.