A succah that is more than twenty cubits high is invalid. R’ Yehudah validates it.  And [a succah] that is not ten handbreadths high, or [one] that does not have three walls, or [one] whose sun[ny area] is greater than its shade[d area], is invalid.  An old succah —- Beis Shammai invalidate it and Beis Hillel validate it. And what is [considered] an “old” succah? Whatever one built thirty days prior to the Festival. But if one built it specifically for the Festival, even [if he put it up] at the beginning of the year, it is valid.

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.