A triplet star is composed of three main sequence stars, star 1 has initially the same mass as the Su Mo, star 2 is more massive M₂ = 10M, and star 3 is less massive M3 = 0.1Mo. Knowing th un has an estimated lifespan of 10 billion years in the main sequence (T1 = To = 1010 yr): What is the lifespan of star 2 in the main sequence, T2 in years? What is the lifespan of star 3 in the main sequence, T3 in years?

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