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 probability that the jump's round off error is greater than 1.86 is P(x > 1.86) =
2. P(x > 3.2 | x > 0.9) =
3. Find the 31st percentile.
4. Find the minimum for the upper quartile.