(a)[3]
Determine the number of different ways that all nine letters of TENNESSEE can be arranged.
(a(i))[3]
Determine the number of ways in which all the letters E are together.
(a(ii))[3]
Determine the number of ways in which the $T$ is at one end and there is an $S$ at the other end.
(b)[3]
Four letters are chosen from the nine letters of VENEZUELA. Find the number of selections that include exactly one E.