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Q4. a) Transpose the following formula to make v the subject: S = 1/k log_e⁡(L/(L - v² )) (6)

b) Solve the following equation for n: 5^{n - 2} = 3^{n - 1} (6)

c)The time, t seconds, for a voltage to drop from E to V, is given by t = CRlog_e (E/V)

Calculate t when C = 3×10^{- 6}, R = 2×10⁶, E = 24 and V = 15. (4)