Pharmaceutical companies promote their prescription drugs using television adivertising. In a survey of 75 randomly sampled tolevision viewers. 6 indlcated that they asked their physician about using a prescription drug they saw advertised on TV. a. What is the point estimate of the popuration proportion? (Round your answers to 1 decimal places.) b. What is the margin of error for a 90% confidence interval ostimote? (Round your answers to 2 decimal places.) Compute the 90% confidence interval for the population proportion. (Round your answers to 3 decimal places.)