Manitoba Life Assurance Corp

The Manitoba Life Assurance Corp. (MLAC) currently has shares trading. Suppose MLACs stock is currently selling for $42, and a put option with a value of $3 has an exercise price of $40 and 6 months until expiration . To prevent arbitrage opportunities , what should be the value of a call option with the same strike price and expiration date? Assume that the options are European and that the effective annual risk-free rate is 6%.