An engineered tissue system consists of a flat rectangular plate of immobilized cell mass, whose bottom face is exposed to water and nutrients; the top face is exposed to O2 gas. The O2 gas flowing above the tissues at 300K and 1atm is used to control the temperature at the surface of the tissues at 310 K. The properties of O2 can be assumed to be constant between 300310K, which are: =1.3kg/m3, C_p =920J/kgK,=2.06105kg/ms, and k=0.027W/mK. A. What is the Prandtl number (Pr) for the flowing O2 gas? mmolO2/cm3hr. The energy released from respiration is 300J/mmolO2 consumed. For "mk1", what is the generation of heat per unit surface area? (in W/m2) C. A different engineered tissue "mk2", with thickness of 0.3cm and length of 3cm, generates 180 W/m2 of heat per unit area of tissue surface. What is the Nusselt number, Nu for the tissue "mk2"? D. For another engineered tissue "mk3", with thickness of 0.5cm and length of 5cm, the required heat transfer coefficient h is equal to 12W/m2K. What is the required flow rate of O2 gas for the tissue "mk3"? (in m/s )