A juice manufacturer wants to estimate the average weight of…

A juice manufacturer wants to estimate the average weight of its bottles of cherry juice. A sample of 62 juice bottles was collected, the average (mean) weight is 351 gr. The population standard deviation is known to be 5 gr. The manufacturer wants to get the 90% confidence interval for the true mean weight of all of its bottles of cherry juice. What critical value should be used when constructing the interval?