A stock priced at $65 has a standard deviation of 30%. Three-month calls and puts with an exercise price of $60 are available. The calls have a premium of $7.27, and the puts cost $1.10. The risk-free rate is 5%. Since the theoretical value of the put is $1.525, you believe the puts are undervalued. If you want to construct a riskless arbitrage to exploit the mispriced puts, you should

Wo firms, a and b, each currently dump 50 tons of chemicals into the local river. the government has decided to reduce the pollution and from now on will require a pollution permit for each ton of pollution dumped into the river. it costs firm a $100 for each ton of pollution that it eliminates before it reaches the river, and it costs firm b $50 for each ton of pollution that it eliminates before it reaches the river. the government gives each firm 20 pollution permits. government officials are not sure whether to allow the firms to buy or sell the pollution permits to each other. what is the total cost of reducing pollution if firms are not allowed to buy and sell pollution permits from each other? what is the total cost of reducing pollution if the firms are allowed to buy and sell permits from each other? a. $3,000; $1,500 b. $4,500; $3,500 c. $4,500; $4,000 d. $4,500; $2,500