please show clear calculations plus methods

A 5cm diameter naphthalene ball is placed in a stagnant air at 40C and 1atm. Bulk concentration of naphthalene in air is negligible. The diffusivity of naphthalene in air is 6106m2/s. Vapor pressure of naphthalene at 40C is 0.15atm. Density of naphthalene is 1.0g/cm3, Molecular weight of naphthalene is 128g/mol. At 40C, viscosity of air air=1.8105kg/ms; density of air air=1.123kg/m3. 1. Determine: 1. Rate of loss of naphthalene from the surface of the ball initially in mol/s in the stagnant air; 2. Rate of loss of naphthalene from the surface of the ball in mol/s if the air starts to blow across the naphthalene ball at 5.6m/s ? 3. If the air starts to blow at 5.6m/s, how long does it take for the naphthalene ball to decrease from 5cm to 2.9cm in diameter