Questions about a group prayer?

I go to a Christian university and I'm delivering a group project today. We're supposed to start our project off with a prayer and my project partner has asked me to deliver it because she feels uncomfortable. I have never led a prayer before, whenever I pray I am typically alone and so I am uncertain of how to handle this. Should I start the prayer with "Lord" or "Father" or "God" or what? And how should I end the prayer? Should I just say "amen" or should I say "in Jesus' name amen"? Thanks in advance for the help!