WriteaC++functionthatreceivesasingleletterandprintsoutthecorrespondingdigitonthetelephone.Thelettersanddigitsonatelephonearegroupedthisway:2=ABC3=DEF4=GHI5=JKL6=MNO7=PRS8=TUV9=WXYNodigitcorrespondstoeitherQorZ.Forthese2lettersyourprogramshouldprin