Let $E, F, G$ be three events. Find expressions for the events that of $E, F, G$
(a) only $F$ occurs,
(b) both $E$ and $F$ but not $G$ occur,
(c) at least one event occurs,
(d) at least two events occur,
(e) all three events occur,
(f) none occurs,
(g) at most one occurs,
(h) at most two occur.