[填空题]
Peter is playing on a swing during a s hjwm29n*zbkc.aax5 )chool luncvvan* n w m/prs3 i,-af0i 3mb+icvf.,h break. The height of the first swinn fr vs*w,imn- a3a.i0, /f vvip3mbc+g was 2 $\mathrm{~m}$ and every subsequent swing was 84 % of the previous one. Peter's friend, Ronald, gives him a push whenever the height falls below $1 \mathrm{~m}$ .
1. Find the height of the third swing.≈
2. Find the number of swings before Ronald gives Peter a push. n =
3. Calculate the total height of swings if Peter is left to swing until coming to rest.
