What is the number of electrons in bonding molecular orbitals and antibonding molecular orbitals respectively in $F_2$ molecule?

In oxygen $(O_2)$ and carbon $(C_2)$ molecules,the bonding is:

The difference between bond orders of $CO$ and $NO^{\oplus}$ is $\frac{x}{2}$ where $x = .....$
(Round off to the Nearest Integer)

The wave functions of $1s$-orbitals of two hydrogen atoms are $\psi_A$ and $\psi_B$. $\psi_A$ and $\psi_B$ are linearly combined to form two molecular orbitals ($\sigma$ and $\sigma^*$). Which of the following statements are correct?
$I$. $\sigma^*$ is equal to $(\psi_A - \psi_B)$.
$II$. In $\sigma$-orbital,one nodal plane is present in between two nuclei.
$III$. The energy of $\sigma$-orbital is lower than the energy of $\sigma^*$-orbital.

Which of the following $M.O.$ has two nodal planes?

Assuming $2s-2p$ mixing is $NOT$ operative,the paramagnetic species among the following is: