Questions with basis trading on questions 8 and 9

please and thank you!

8) The merchandiser asks that you call in a futures order to your broker to set a pre-spread that will position you to buy 50,000 bushels of corn in October and sell it in April if/when the spread trades at . 18 carry. What do you tell your broker? a) Enter an open order to buy 10 contracts DEC corn and sell 10 contracts MAY corn at . 18 premium to the DEC. b) Enter a day order to buy 10 contracts MAY corn and sell 10 contracts DEC corn at . 18 premium to the DEC. c) Enter an open order to buy 10 contracts MAY corn and sell 10 contracts DEC corn at. 18 premium to the MAY. d) Enter an open order to buy 10 contracts DEC corn and sell 10 contracts MAY corn at .18 premium to the MAY. 9) You are currently short 50,000 bushels of DEC com futures. You wish to spread those futures to the JUL at a .25 carry. What instructions do you give your broker to enter the order as a standing offer until either filled or cancelled? a) Enter an open order to buy 10 contracts of DEC corn and sell 10 contracts JUL corn at 25 premium to the JUL b) Enter an open order to buy 10 contracts of JUL corn and sell 10 contracts DEC com at 25 premium to the DEC. c) Enter an open order to buy 10 contracts of DEC corn and sell 10 contracts JUL corn at 25 premium to the DEC. d) Enter an open order to buy 10 contracts of JUL corn and sell 10 contracts DEC com at a .25 premium to the JUL