#2 only pls and hurry

Can someone me with 3 and 4 plz. this is for masteries test.

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.

What is the work done by the electric force to move a 1 c charge from a to b?