A disk with a rotational inertia of 7.00kg⋅m² rotates like a merry-go-round while undergoing a variable torque given by τ=(5.00+2.00t)N⋅m. At time t = 1.00 s, its angular momentum is 5.00kg⋅m2/s. What is its angular momentum at t = 5.00 s?