Explain the call-put parity relation and how it is justified.(30 marks). Black-Scholes-Merton formula uses five variables to calculate the price of call and put options. Explain each of these variables incorporated in Black-Scholes-Merton formula. Show how the change in these variables affects the price of option. Show how these variables are grouped to show put-call parity relationship and suggest the condition in which there is an arbitrage opportunity. (70 marks).