What is the minimum length and width of a pull box having an angle pull, with one four$-$inch conduit coming in and one four$-$inch conduit leaving on adjacent sides? The conductors are $4$ AWG or larger and are not spliced.

a$.12"$

b$.{15}^{\text{'}\text{'}}$

C$.{18}^{\text{'}\text{'}}$

d$.24"$

e$.{30}^{\text{'}\text{'}}$