What price do farmers get for their watermelon crops? In the third week of July, a random sample of 44 farming regions game a sample mean of x=$6.88 per 100 pounds of watermelon. Assumed that o is...

What price do farmers get for their watermelon crops? In the third week of July, a random sample of 44 farming regions game a sample mean of x=$6.88 per 100 pounds of watermelon. Assumed that o is known to be $1.96 per 100 pounds.
find a 90% confidence interval for the population mean price (per 100 pounds) that farmers in this region get for their watermelon crop. What is the margin for error? Lower limit? Upper limit? Found two decimal places