The round off errors when measuring the distance that a long jumper has jumped is uniformly distributed between 0 and 4.3 mm. Round values to 4 decimal places when possible.

1. The mean of this distribution is
2. The standard deviation is
3. The probability that the round off error for a jumper's distance is exactly 0.2 is P(x = 0.2) =
4. The probability that the round off error for the distance that a long jumper has jumped is between 0 and 4.3 mm is P(0.9 < x < 3.7) =