Neurological research has shown that for about 80% of the population, language skills reside only in the left side of the brain. For 10% of the population, it is more on the right side, and the remaining 10% the capacity is two-sided. (The last two groups are mainly left-handed people.) We randomly select 25 people. What is the expectation and standard deviation of the number of people for whom language skills reside only in the left side of the brain in the selected individuals