A city park is adjacent to some town houses and apartment buildings. The residents rent their homes and therefore do not have the opportunity to install solar panels. A solar developer proposes to install solar panels on part of the park and offer the electricity to the residents at 10% less than what they would pay the electric power company. The developer surveys a random sample of residents and asks whether they would like the solar panels to occupy 0%, 5%, or 10% of the park. In other cities with similar parks, town houses, and apartment buildings, the solar developer has found that on average residents would like the solar panels to occupy 7.6% of the park. a] How many residents should the developer survey in order to get an approximately Normal sampling distribution? b} Suppose the developer surveys 100 residents and finds that 60 of them answer 0%; 20 of them answer 5% and 20 of them answer 10%. What is the mean and standard deviation of this sample? c) What is the standard deviation and standard error of the corresponding sampling distribution