Consider a rectangular-shaped gel tablet of thickness 0.652 cm and width 1.0 cm. The edges of the gel tablet are sealed. The initial concentration of the drug Dramamine (solute A) in the gel (B) is 64.0 mg/cm^3, to provide a total drug dosage of 41.7 mg. The diffusion coefficient of the drug in the gel is 3:0 × 10-7 cm^2/s. What is the residual concentration of drug at the center of the tablet after 96 h? The concentration of the drug at the exposed surface of the tablet is maintained at zero.