A Google research study asked 5002 smartphone users about how they used their phones. In response to a question about purchases, 2660 reported that they purchased an item after using their smartphone to search for information about the item. (a) What is the sample size n for this survey? "=3 (b) In this setting, the population proportionp is the (xed, but unknown) population proportion of: O smartphone users who have purchased an item after using the phone to search for information Q smartphone users who use the phone to search for information Q smartphone users (c) What is the count X? (d) Find the sample proportion ( 10.001)