[填空题]
(II) A sports car of m q4 5 -ew8flms)qk3p 2fs(zuub 2x:lhkass 950 kg (including the driver) crosses the rounded t 2(mub 5e1qcu7q2 eoyt)oit(bop iu((7 b e12tyo5embcu 2qtq )oof a hill (radius =95$ \mathrm{~m}$ ) at 22 $\mathrm{~m} / \mathrm{s}$ . Determine
(a) the normal force exerted by the road on the car,
(b) the normal force exerted by the car on the 72-kg driver
(c) the car speed at which the normal force on the driver equals zero.
