According to an online source, the mean time spent on smartphones daily by adults in a country is 2.35 hours. Assume that this is correct and assume the standard deviation is 1.4 hours. Complete parts (a) and (b) below.

a. Suppose 150 adults in the country are randomly surveyed and asked how long they spend on their smartphones daily. The mean of the sample is recorded. Then we repeat this process, taking 1000 surveys of 150 adults in the country. What will be the shape of the distribution of these sample means?

b. Refer to part (a). What will be the mean and standard deviation of the distribution of these sample means? The mean will be ?? and the standard deviation will be ??