You may need to use the appropriate appendix table or technology to answer this question. A survey of 346 working parents found 250 who said they spend too little time with their children because of work commitments, (a) What is the point estimate of the proportion of the population of working parents who feel they spend too little time with their children because of work commitments? ( Round your answer to four decimal places.) 0.7225 (b) At 95% confidence, what is the margin of error? ( Round your answer to four decimalplaces.) Enter a number. (c) What is the 95% confidence interval estimate of the population proportion of working parents who feel they spend too little time with their children because of work commitments? (Round your answers to four decimal places.)