Can someone help me with these three questions? Thanks.

A newspaper article reported that people spend a mean of 7.5 hours per day watching TV, with a standard deviation of 1.9 hours. A psychologist woul conduct interviews with the 20% of the population who spend the most time watching TV. She assumes that the daily time people spend watching TV normally distributed. At least how many hours of daily TV watching are necessary for a person to be eligible for the interview? Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place. Suppose that a new treatment is successful in curing a common ailment 63% of the time. If the treatment is tried on a random sample of 70 patient approximate the probability that fewer than 48 will be cured. Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not round any intermediate steps. (If necessary, consult a list of formulas.) X ? A soft drink company has recently received customer complaints about its one-liter-sized soft drink products. Customers have been claiming that the one-liter- sized products contain less than one liter of soft drink. The company has decided to investigate the problem. According to the company records, when there is no malfunctioning in the beverage dispensing unit, the bottles contain 1.01 liters of beverage on average, with a standard deviation of 0.14 liters. A sample of 30 bottles has been taken to be measured from the beverage dispensing lot. The mean amount of beverage in these 30 bottles was 0.99 liters. Find the probability of observing a sample mean of 0.99 liters or less in a sample of 30 bottles, if the beverage dispensing unit functions properly. Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places. 0 X