In the game Roulette, a ball spins on a circular wheel that is divided into 38 arcs of equal lenght, numbered 00, 0, 1, 2, ... , 35, 36. The number on the arc on which the ball stops is the outcome of one play of the game. The numbers are also colored as follows:
1, 3, 5, 7, 9, 12, 14, 16, 18, 19, 21, 23, 25, 27, 30, 32, 34, 36 are red,
2, 4, 6, 8, 10, 11, 13, 15, 17, 20, 22, 24, 26, 28, 29, 31, 33, 35 are black,
0, 00 are green

Define the following events:
$A: \{$ Outcome is an even number (0 and 00 are considered neither odd nor even) $\}$
$B: \{$ Outcome is a red number $\}$
$C: \{$ Outcome is a green number $\}$
$D: \{$ Outcome is a low number (1-18) $\}$
Find the following probablilities:
(a)   $P(A)$ $=$
(b)   $P(A \cap B)$ $=$
(c)   $P(A \cup B \cup C)$ $=$