An F-4 aircraft is slowed after landing by dual parachutes deployed from the rear. Each parachute is \(12 \mathrm{ft}\) in diameter. The F-4 weighs 32,000 lbf and lands at 160 knots. Estimate the time and distance required to decelerate the aircraft to 100 knots, assuming that the brakes are not used and the drag of the aircraft is negligible.