In Table 1, pick one DTMF (Dual-Tone Multi-Frequency) signal which corresponds to a
decimal number (e.g. last digit of your group number). Then open a web browser (e.g.
Internet Explorer) and download the DTMF web-application, given below, which you can see
the DTMF (touch-tone) keypad, mouse-click on the number chosen and you will hear the
corresponding DTMF tone.