4 ) )(a) It was found that 25% of children exposed to a particular infectious agent become ill with the particular disease. Among a play group of four children with equal exposure to the infectious agent, what is the probability that (i) No child will be ill (ii)At least one child will be ill (iii) At most one child will be ill (b)If the serum Uric acid level in a normal male are approximately normally distributed with a mean of 5.4mg per 100ml with a standard deviation of 1.Omg per 100ml. What is the probability that a healthy male selected at random will have a serum uric acid level (i)Between 4.0 and 7.0 mg per 100ml (ii) Below 5.Omg per 100ml (iii)Above 6.0mg per 100ml