Kinematic Physics Mathematical Equations?

Hey guys, Can someone please baby step me through these two problems? I"m having difficulty with them. Thank you! #1 - If a spring gun shoots a ball horizontally at 8 m/s, and the ball starts out 1.7 m above the floor, how far away from the gun will the ball land? #2 - Predict the horizontal distance a cannon on a 15 m cliff will shoot if it's initial velocity is 140 m/s and it's inclined at 15 degrees.