Answer
Electron arrangment, electron geometry
a) Tetrahedral, Trigonal pyramidal
b) Tetrahedral, Tetrahedral
c) Tetrahedral, Tetrahedral
d) Trigonal Bipyramidal, Distorted tretrahedral (see saw)
Work Step by Step
a) 26 ve-, 4 electron domains, 3 bonded pairs, 1 lone pairs
b) 26 ve-, 4 electron domains, 4 bonded pairs, 0 lone pairs
c) 8 ve-, 4 electron domains, 4 bonded pairs, 0 lone pair
d) 34 ve-, 5 electron domains, 4 bonded pairs, 1 lone pair