Normal probability below a value and the volume exceeded with a given lower-tail probability

The volume, \(V\) ml, of drink in a bottle filled by a machine is normally distributed with mean \(502\) ml and standard deviation \(3.2\) ml.

1. Find the probability that a bottle chosen at random contains at most \(505\) ml.[2]
2. It is given that \(\mathrm{P}(V<b)=0.12\). Find the value of \(b\).[4]