2 The \(n\)th term of a sequence, \(u _ { n }\), is given by
$$u _ { n } = 12 - \frac { 1 } { 2 } n .$$
- Write down the values of \(u _ { 1 } , u _ { 2 }\) and \(u _ { 3 }\). State what type of sequence this is.
- Find \(\sum _ { n = 1 } ^ { 30 } u _ { n }\).