Express the following quantities to the nearest standard prefix using no more than three digits.
(a) \(3600 \mathrm{~s}\)
(b) \(5 \times 10^{13} \mathrm{~W}\)
(c) \(850,000 \mathrm{~Hz}\)
(d) \(68 \times 10^{-12} \mathrm{~F}\)