INSTRUCTION: Attempt Question One and Any Other Three Questions. Question 1 - A. Describe the segments of any C++ application. 3marks B. What is an identifier? 2marks -C. Evaluate the following expressions $ 257 4:3 a=2, b3 and cw6, 5) ab >-c y (a6)) a*-b + 1; Wa-b++; 3marks D. A highway-patrol speed detection radar emits a beam of microwaves at a frequency designated as fe. The beam is reflected off an approaching car, and the radar unit picks up and analyses the reflected beam, fr. The reflected beam's frequency is shifted slightly from fe to fr because of the car's motion. The relationship between the speed of the car, v, in miles per hour (mph), and the two microwave frequencies is v = (6.685 x 10) 10") f-f mph f +f where the emitted waves have a frequency of fe - 2 * 10 10 sec-1. Using the given formula, write a C++ program, using the software development procedure, to calculate and display the speed corresponding to a received frequency of 2.000004 10 10 sec-1. 4marks E. In a directly connected telephone network, all telephones are directly connected and don't require a central switching station to establish calls between two telephones