Please help, I will mark you thank you if you do Please explain well
Look at the picture

1foot = 12 inches; 1 yard = 3 feet

36 inches/second = yards/minute how many yards?

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.