three questions please

Suppose you enter into a long futures contract to buy silver for $6.21 per ounce on the New York Commodity Exchange. The size of the contract is 5000 ounces. The initial margin is S4000, and the maintenance margin is $3000. What FUTURES PRICE will lead to a margin call of $1000? (Please answer to two decimal places) Your Answer: Your Answer Question 12 (1 point) A farmer enters into TWO short live cattle futures contracts when the futures price is $0.90 per pound. The contract is to deliver 40000 pounds of live cattle. How much does the farmer gain or lose if the live cattle price at the end of the contract is 0.89 dollar per pound? (Please answer to two decimal places, if a loss write as a negative number) Your Answer: Your Answer Question 13(1 point) Open interest will increase cach time a trade is opened and decrease cach time a trade is closed. True False