[填空题]
Peter is playing on a swing during a schoo2d;c5vn29fch )kwn a z idy,)s9d4vsv l lun8x9fvy z:tyc9qs 5 d(ych break. The height of the first swingyx9z9dc: s 8qv( ty5fy 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.
