The International Marine Organization is, implementing a ban on the use of tributyltin compounds in anti-fouling paints on ships. The [Bu₃Sn]⁺ cation is leached from paints into the water where it undergoes biodegradation by marine bacteria to [Bu₂Sn]²⁺ and [BuSn]³⁺. Tributyltin compounds (TBT) are more toxic than di- or monobutyltin derivatives (DBT and MBT). The first order rate constants for TBT, DBT and MBT are 0.33, 0.36 and 0.63 y⁻¹, respectively. Determine the half-life of each species in the water.