[填空题]
Peter is playing on q).r56he b(fqv,cy gf1 pzlb.qao7:q ae; iy )hi.:newf , 8gev8m*iaa swing during a school lunch break. The height of the first swing was :ei qqg8;iana8)faeiy .h * ,vw:7eom2 $\mathrm{~m}$ 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.
