<image>The housing price has been one of the hot topics in recent years. To understand the expectation of the residents in Dalian regarding housing prices, a media outlet in the city conducted a questionnaire survey among citizens attending a housing exhibition in 2009, and a random sample of these questionnaires was selected. The image is an incomplete statistical chart drawn based on the results from the statistics bureau. Answer the following questions based on the information provided in the chart:

(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 and above is ______%;
(4) If there were 150,000 citizens in Dalian with intentions to buy houses in 2009, estimate how many of them expect the price per square meter to be between 5000 and 7000 yuan? Additionally, estimate the number of people expecting the price to be below 5000 yuan, between 5000 and 7000 yuan, and 7000 yuan and above.