One of the questions on a survey asked adults if they used the internet at least occasionally. The results showed that 450 out of 478 adults aged 18–29 answered Yes; 743 out of 833 adults aged 30–49 answered Yes; 1,062 out of 1,644 adults aged 50 and over answered Yes. (Round your answers to four decimal places.) (a) Develop a point estimate of the proportion of adults aged 18–29 who use the internet.