A student did a poll of a sample of 32 students at Ooltewah and found their amount of pets they owned was normal distributed. He found that the sample mean was 3.4 and the population standard...

Does anyone know how to do these two problems?

Extracted text: A student did a poll of a sample of 32 students at Ooltewah and found their amount of pets they owned was normal distributed. He found that the sample mean was 3.4 and the population standard deviation (o-) was 2.1 pets. Find a confidence interval for the population mean for this situation at 90% confidence. You must show 2 your work for full credit. Show Your Work 3 The student decided that 90% was not good enough and wants to be more sure. Take the same scenario from 2. problem 2 but use 99% confidence and find it in the calculator.