Is Roger's Grade the Second Highest?

Question 1

There are five students in a group: Roger, Martin, Peter, Gary and Katherine. 1. Roger received a higher grade than Martin but not as high as Peter. 2. Peter received a higher grade than Gary and Katherine. 3. Gary received a lower grade than Martin. 4. Gary did not receive the lowest grade. 5. Roger received the second highest grade. If the first four statements are true, then the fifth statement