2 . \ The time* ( in minutes ) that it takes a teller to serve a customer at a bank follows some right - skewed distribution with mean 5 minutes and

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2 . \ The time* ( in minutes ) that it takes a teller to serve a customer at a bank follows someright - skewed distribution with mean 5 minutes and standard deviation 4 minutes .( 2 ) Can you calculate the probability that the teller spends more than 6 minutes withthe next customer ? If so , do the calculation . If not , explain why.( b ) What is the probability that the teller spends an average between 4 and 7 minuteswith the next 30 customers ?( C ) What is the probability that the teller serves the next 10 customers in under 2hours ? ( Assume there is always a customer waiting in line . )( d ) Are the probabilities you calculated in ( b ) and ( C ) exact or approximate ? Explain .27 no