A soft drink dispenser is set to automatically dispense drinks and ice in 8 oz. cups. The machine is set to fill the cups with 7 1/4 oz. so that the liquid will not run over the top of the cup. The company is getting complaints that the machie is filling the cups too full and spilling over. When the machine is operting properly, only 1% of the cups will not be filled properly. The production manager conducted a one-tail hypothesis teset at the 0.01 level to check the machine. A sample of 70 fills was measured. What is the critical value of t?