A company is engaged in the packaging of a superior quality tea in jars of 500gm each. The company is of the view that the process is under control as long as the jars contains on average 500gm of tea. The standard deviation of the process is 50gm. A random sample of225 jars is taken and the sample average is found to be 510 gm. Has the process gone out of control? Make your conclusion based on (A) critical value at 2% level of significance (B) Find the p-value and interpret it.