The order of the shofar blasts are three [sets] of three [blasts] each. The duration of a tekiah is like three teruos. The duration of a teruah is like three quavers.  If one blew the first [tekiah] and prolonged the second [tekiah] for the duration of two [tekios] —- it counts as only one.  If one recited the blessings and later a shofar became available to him, he should blow tekiah-teruah-tekiah three times.  Just as the chazzan is obligated, so is every individual obligated.  Rabban Gamliel says: The chazzan discharges the congregation’s obligation.