[填空题]
Peter is playing on a swing during a school lunch break. The height:hjes/qyfm tw-m7 5,q oq ip/:v1z(v6kqdx* ej f the first swing wzviq x6:(p*qjed 1/ kvas 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.
