Indicate the parameter to contrast, make the formulation of the hypotheses and graph the statistical curve indicating the regions of acceptance and rejection:

1) The Balance Sheet of a S.A., which has 200 debtors, shows a total of $3,500,000 for the heading Other Credits. The board of directors hires an external auditor since it considers that the average balance of said account is not the one reflected in the accounting. Circulars are sent to 49 randomly selected debtors, who confirmed owing a total of $870,000. The population variance is known to be 300,000 pesos^2. At the 5% level, is the figure shown on the balance sheet reliable?

2) A soft drink bottler says that the average amount of beverage in his 1-liter bottles is 1.08. The Consumer Defense Office has received numerous complaints from customers who claim that the content is less than 1 litre. In order to respond to these complaints, the State Office decides to carry out a hypothesis test.