Please help, i can't afford a B or lower on my test my parents will kill me, please help and i will give you brainliest and points IF you get it right. I filled it already, but please can you answer the boxes from the boxes below?

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean