A company needs to provide Wi-Fi coverage spanning a radius of about 100 m in a flat outdoor area. In the center of the area, APsand 2.4 GHz omnidi recto id i antennas (11 dBi gam and 15° vertical beam width) are installed on the top of a six-story building. A laptop 70 m away from this building cannot receive Wi-Fi signals. Which of the following statements is true about the cause analysis and solution for this symptom?