For the following electronic configuration:

$,{}_8$

$,{}_7$

$,{}_6$

$,{}_5$

$,{}_4$

$,{}_3$

$,{}_2$

$,{}_1$

a$.$ Show the virtual orbitals.

b$.$ Is this description RHF or UHF?

c$.$ Write down the Slater determinant for the ground state.

d$.$ Draw a singly excited electronic configuration and their corresponding Slater determinants.

e$.$ Draw a doubly excited electronic configuration and its corresponding Slater determinants.