[Review Topica] (References] Specify the local electron geometries about the atoms labelled a-d. Unshared electron pairs affect local geometry and are included in the structural formula. For each atom enter one of the following: tetrahedral, square planar, trigonal planar, trigonal pyramidal, or linear. H H H -H nited (a) (b) @ (d) Submit Answer Retry Entire Group 8 more group attempts remaining