Alex works at Kumasi brewery.The factory has a machine that dispense 80mL of Akpeteshie in a bottle.Alex believes the average amount of Akpeteshie is not 80mL.Using 40 samples he measures the average amount dispensed by the machine to be 78mL with a variance of 6.25.(a) State the Null and alternate hypothesis.(b) At 95% confidence level is there enough evidence to support the idea that the Machine is not working properly?