(i) h(1)=30 m,h(1.5)=17.5 m,h(1.7)=11.1 m\boxed{h(1)=30\text{ m},\quad h(1.5)=17.5\text{ m},\quad h(1.7)=11.1\text{ m}}h(1)=30 m,h(1.5)=17.5 m,h(1.7)=11.1 m