Can someone answer this correctly - data management grade twelve it is a normal distribution course

Formulas np inpq Z = X -H Show full solutions. Make sure you state what you are finding. 1 The lifetimes of new laptops are normally distributed with a mean of 5.3 years and a standard deviation of 1.3 years. a) Sketch a normal distribution of lifetimes. Label the mean and the values that are 1, 2, and 3 standard deviations from the mean. [3] b) Label the percent of data that lies between each interval. (3] c) What percent of laptops have a lifetime of. More than 7.9 years ii) between 2.7 and 6.6 years? [2] d Laptops that have lifetimes less than 4.0 years are rejected and not allowed to . be shipped to stores. In a production run of 2500 laptops, how many will be rejected? [2]