Normal Approximation According to the May 16,2017 report by Pew Research, 45% of US adults say solar energy is very effective in minimizing air pollution. A sample of 160 U.S adults are surveyed. Let...

Please answer these I'm very confused. Thank you so much

Extracted text: Normal Approximation According to the May 16,2017 report by Pew Research, 45% of US adults say solar energy is very effective in minimizing air pollution. A sample of 160 U.S adults are surveyed. Let p be the sample proportion of Americans who believe solar energy is very effective in minimizing air pollution. 1. What is the population proportion? (decimal form) 2. What is the sample size? 3. Can the normal approximation be used with this distribution? 4. What is the mean of the sampling proportion? 5. What is the standard deviation of the sampling proportion? (Round to 4th decimal place) 6. What is the probability that no more than 76 U.S adults of the 160 surveyed believe solar energy is very effective in minimizing air pollution? What is p? 0.475 (decimal form) What is the z-score? 0.64 (Round to the hundredths place) What is the probability that no more than 76 U.S. adults of the 160 surveyed believe solar energy is very effective in minimizing air pollution? 0.7389| (decimal form)