<image>Housing prices have been one of the hot topics of social concern in recent years. In order to understand the expected prices of houses among Dalian residents, a media outlet in the city conducted a questionnaire survey among citizens who participated in a housing expo in 2009, and randomly selected some questionnaires from the survey. The incomplete statistical chart below is based on the results from the statistics bureau. Use the information provided in the chart to answer the following questions:

(1) A total of ______ questionnaires were selected;
(2) Among the selected questionnaires, the number of people expecting the price per square meter to be between 5000 and 7000 yuan is ______;
(3) Among the selected questionnaires, the percentage of people expecting the price per square meter to be 7000 yuan or above is ______%;
(4) If there were 150,000 citizens with home-buying intentions in Dalian in 2009, please estimate how many of them expect the price per square meter to be between 5000 and 7000 yuan? How many expect it to be below 5000 yuan, and how many expect it to be between 5000 and 7000 yuan or 7000 yuan and above?