You may need to use the appropriate appendix table or technology to answer this question.The number of adults in the United States who smoke has declined greatly. In $2005$ more than $20\%$ of adults in the United States smoked, but this declined to about $12\mathrm{.}5\%$ in $2020.$ Consider a group of $340$ adults surveyed in the year $2020,$ and use the normal approximation of the binomial distribution to answer the questions below.$($a$)$What is the expected number of adults who smoke? adults$($b$)$What is the probability that fewer than $40$ smoke? $($Round your answer to four decimal places.$)($c$)$What is the probability that from $45$ to $50$ smoke? $($Round your answer to four decimal places.$)($d$)$What is the probability that $55$ or more smoke? $($Round your answer to four decimal places.$)$