The Wall Street Journal reported that the age at first startup for 10% of entrepreneurs was 29 years of age or less and the age at first startup for 90% of entrepreneurs was 30 years of age or more. (a)Suppose a sample of 200 entrepreneurs will be taken to learn about the most important qualities of entrepreneurs. Calculate the sampling error of p where p is the sample proportion of entrepreneurs whose first startup was at 29 years of age or less. If required, round your answers to four decimal places.