Write the notes C, E, G and B on the treble clef. Draw the C note underneath the first staff line, and draw a small ledger line through the note to indicate that it is middle C. Draw the E on the first (bottom) staff line. Draw the G on the second staff line and the B on the third (middle) staff line.
Write the same notes on the bass clef. Draw the C on the second space from the bottom. Draw the E on the third space and the G on the fourth (top) space. Draw the B on top of the top line.
Draw the CM7 chord on a guitar chord grid. Draw a circle with a 3 in it on the second vertical line, in the third horizontal space. Draw a circle with a 2 in it on the third vertical line, in the second horizontal space.
Draw a CM7 chord on tab paper by drawing a 3 on the second line from the bottom and a 2 on the third line.