Chemistry 4 questions 40 points and brianest

question 1
how are sp3 hybrid orbitals arranged around a nucleus?

two orbitals in a linear shape
one orbital in an hourglass shape
four orbitals in a tetrahedral shape
three orbitals in a trigonal planar shape

question 2
what is the three-dimensional structure of the nuclei of atoms in a molecule or polyatomic ion called?

lewis dot structure
bond length
molecular geometry
molecular formula

question 3
what is the molecular geometry of the molecule methane (ch4)?

trigonal planar
not enough information provided
tetrahedral
linear

question 4
based on the vsepr theory, what molecular shape can be predicted if a molecule has two bonding electron pairs and one lone electron pair around the central atom?

bent
linear
trigonal planar
tetrahedral