A recent survey of ofce workers for a company was done on preferred drink in the morning. The results were as follows: Preferred Drink OBSERVED Coffee Tea FREQUENCY Male 70 7 Gender Female 1 07 l 6 The null and alternative hypotheses are: Ho: No relationship between gender and preferred drink H1: There is a relationship between gender and preferred drink (a) (3",) Calculate the expected frequency per cell. Show your workings clearly. (ii) Calculate the Z2 test statistic, to 3 decimal places