Determine the electron geometry (eg) and molecular geometry (mg) of PF5.
1) eg = trigonal planar, mg = octahedral
2) eg = tetrahedral, mg = trigonal pyramidal
3) eg = trigonal bipyramidal, mg = tetrahedral
4) eg = trigonal bipyramidal, mg = trigonal bipyramidal
5) eg = octahedral, mg = octahedral