A professor knows that in the past, the average amount of time spent studying the night before the first exam was 140 minutes with a normal distribution and a standard deviation of 75.1. The professor finds that the average amount of time spent studying the night before the first exam for the current class of 40 students is 165 minutes.

a) Please identify the following values from the above study description.

The population mean (µ) equals ________________.

The population standard deviation (ơ) equals _________________.

The sample size (n) equals ______________________.

The sample mean (M) equals __