Please help me with these questions please and thank you. If you can provide notes they would be amazing.

1) A dihedral angle is an angle between planes. For example, the dihedral angle between the xy plane and the yz plane is 90 degrees. What is the dihedral angle between the plane determined by the two vectors (1, 2,3) and (2, 0,3) and another plane determined by the two vectors (4, 2, 2) and (0, 0, 1)? 2) A baseball player hits a ball at an angle of 30 degrees from the horizontal. The impact of the hit occurs four feet off the level ground above home plate and the velocity of the ball is 100 miles per hour. Would the ball clear a thirty foot high fence located 450 feet from home plate