A pharmaceutical company is developing a topical gel formulation that contains 0.5% (w/w) polyacrylic acid as a thickener in 50% (v/v) glycerin. The gel will be applied to the skin for the treatment of psoriasis. The flow rate of the gel through a cylindrical tube with a diameter of 5 mm and a length of 20 cm is to be determined, assuming laminar flow.

please determine shear stress, viscosity and flow rate. thank you