Random Sample of 150. Details and questions in the picture

According to the research , 49% of homes sold in a certain month and year were purchased by first -time buyers . A random sample of 150 people who just purchased homes is selected .Complete parts a through @ below ."b . What is the probability that less than 78 of them are first-time buyers ?"P ( Less than 78 of them are first – time buyers ) = \( Round to four decimal places as needed . )C . What is the probability that more than 81 of them are first -time buyers ?"P ( More than 81 of them are first -time buyers ) = \( Round to four decimal places as needed . )d . What is the probability that more than 73 of them are first -time buyers ?"P ( More than 73 of them are first – time buyers ) = \( Round to four decimal places as needed . )e . What is the probability that between 64 and 70 of them are first -time buyers ?"P ( Between 64 and 70 of them are first – time buyers ) = \