Casino games often use a fair die that has six sides with 1 to 6 dots on them. When the die is tossed or rolled, each of the six sides is equally likely to come out on top. Using the physical assumption that the die is fair, determine the probability of each of the outcomes for the number of dots showing on top after a single roll of a die. (Enter your answers as fractions.)

(a) four dots (b) one or two dots (c) an odd number of dots