Create a C++ program that will input a single letter and printout the corresponding digit on the telephone. The digits and letters on the telephone are associated as follows: 2 = ABC 3 = DEF 4 = GHI 5 = JKL 6 = MNO 7 = PRS 8 = TUV 9 = WXY There is no digit corresponding to either Q or Z. for this letters your program should print a message indicating that they do not exist on the telephone dial. The program should use switch statement accept either uppercase or lowercase.  INCLUDE THE PICTURE OF SOURCE CODE/ DEV C++

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