A large tank is filled with water (density = 1 g·cm⁻³) up to a height of 5 m. A 100 μm diameter solid spherical particle (density = 0.8 g·cm⁻³) is released at the bottom of the tank. The particle attains its terminal velocity (v_t) after traveling to a certain height in the tank. Use acceleration due to gravity as 10 m·s⁻² and water viscosity as 10⁻³ Pa·s. Neglect wall effects on the particle. If Stokes' law is applicable, the absolute value of v_t (in mm·s⁻¹) is ____________ (rounded off to two decimal places).