题4小明家订购某住宅小区房屋一套,小明的爸爸复印平面图纸(如图1)带回家,并告诉小明以下一些信息: (1)住宅小区所有住宅的中心价是a=2800元/m2;房屋售价(单位:元/m2,以建筑面积计)的计算公式是b=ka,其中k是楼层售价系数,楼层系数(见附表); Question 4 Xiaoming family orders a house in a residential area. Xiaoming’s father copies the plan paper (Figure 1) and takes them home. He tells Xiao Ming the following information: (1) The central price of all residential units in the residential area is a=2800 yuan/ M2; The calculation formula for the sale price of a house (unit: yuan/m2, calculated in terms of building area) is b=ka, where k is the floor sale price coefficient and floor factor (see attached table);