Problem 5 In the methane molecule, CH4, each hydrogen atom (H) is at a corner of a regular tetrahedron with the carbon atom (C) at the center. In coordinates where one of the C-H bonds is in the direction of F1 : E | 3 | is an adjacent CH bond is in the F2 : E 5 ic direction. (a) What is the dot product F1 - F2? F1 \"F2 : Calculate the angle 6 between these two bonds using the \"dot product". Give your answer as an integer. 9 : degrees (b) What is the cross product F1 >