A chemical reaction is a "fifth-order reaction". If the reaction rate constant is k, and the initial concentration of the reactant is Ço (in mg/L). Please derive the expression for

the half-life of this reaction [Show step-by-step derivation]. If the half-life is 5 days and the initial concentration of the reactant is 1 mg/L, what is the reaction rate constant of this.chemical reaction?I.