4. The random variable \(A\) is normally distributed with a mean of 32.5 and a variance of 18.6
Find
- \(\mathrm { P } ( A < 38.2 )\),
- \(\mathrm { P } ( 31 \leq A \leq 35 )\),
The random variable \(B\) is normally distributed with a standard deviation of 7.2
Given also that \(\mathrm { P } ( B > 110 ) = 0.138\), - find the mean of \(B\).