Please check my work to see if I did this correctly.

Suppose the DJIA stands at 12,600. You want to set up a long straddle by purchasing 100 calls and an equal number of puts on the index, both of which expire in three months and have a strike of 126. The put price is listed at $1.65 and the call sells for $2.65. a. What will it cost you to set up the straddle, and how much profit (or loss) do you stand to make if the market falls by 850 points by the expiration dates on the options? What if it goes up by 850 points by expiration? What if it stays at 12,600? b. Repeat part a, but this time assume that you set up a short straddle by selling/writing 100 July 126 puts and calls. c. What do you think of the use of option straddles as an investment strategy? What are the risks, and what are the rewards? a. To set up the long straddle, it will cost $ 4.3). (Round to the nearest dollar. Enter a positive number for the cost.) If the market on the long straddle falls by 850 points by the expiration dates on the options, the profit (or loss) is $ 845.7. (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) If the market goes up by 850 points by the expiration dates on the options, the profit (or loss) is $ 845.7 (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) If the market stays at 12,600 by the expiration dates on the options, the profit (or loss) is $ -430. (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) b. Your revenue from setting up the short straddle is $ - 4.3. (Round to the nearest dollar.) 845.7. (Round to the nearest dollar. Enter a positive number for a profit and a negative number for If the market on the short straddle falls by 850 points by the expiration dates on the options, the profit (or loss) is $ a loss.) If the market goes up by 850 points by the expiration dates on the options, the profit (or loss) is $ 845.7|. (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) If the market stays at 12,600 by the expiration dates on the options, the profit (or loss) is $430. (Round to the nearest dollar. Enter a positive number for a profit and a negative number for a loss.) c. What do you think of the use of option straddles as an investment strategy? What are the risks, and what are the rewards? (Select the best choice below.)