Suppose stock is currently priced at $50. The margin requirement is 20 percent on uncovered calls and 50 percent on stocks. Calculate the required margin, in dollars, for each of the following trades:

1. Buy 1,000 shares of stock and write 10 call contracts with an exercise price of 45 and a premium of 7.
2. Buy 20 put contracts with an exercise price of 55 and a premium of 7. The option matures in six months.