[填空题]
Peter is playing on a s z;8xdercm rlm* m* yw4g/6/ebwing during a sch:m3v4+zc. qygojf7dqool lunch break. The height of the first swing was 2f4jmcozv: 3y7+. q dgq $\mathrm{~m}$ 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.
