may I get help and explanation using excel for my practice exam question

A survey showed that the average time students spend on Facebook is 2 hours every day with a standard deviation of 34 mins. From the data provided, answer the following: 1. What time spent by students represents the 80th percentile? 2. What time spent by students represents the first quartile? 3. What two values spent by students on Facebook are between the middle 40%