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9- Two years ago. 75% of the customers of a bank said that they were satised with the services provided by the bank. The managu of the bank is afraid that customer satisfaction has decreased since then. She takes a random sample of 100 customers and nds that 69 are satised with the services presided by the bank. Conduct a test of signicance at a= 0.10 a. Select the correct null and alternative hypothesis. (1 pts) i. Ho: 3: = .69 vs H\": p 0.75 iii. Ho: p = .75 vs (-1.: p sf: 0.75 iv. Ho: 3) = .75 vs H.: p