A soft drink company has recently received customers complaints about its one liter sized soft drinks products, customers have been claiming that the one liter sized products contain les than one liter of soft drink. The company has decided to investigate the problem. according to the company records, when there is no manufacturing in the beverage dispensing unit, the bottles contain 1.01 liters of beverage on average with a standard deviation of 0.15 liters. A sample of 70 bottles has been taken to be measured from the beverage dispensing lot. the mean amount of beverage in these 70 bottles was 0.997 litters. find the probability of observing a sample mean of 0.997 liters or less in a sample of 70 bottes. if the beverage dispensing unit functions properly.