2. In order to heat a solution present at a reactor used for citric acid production, a single pass shell and tube heat exchanger is used. The solution is passed with a flow rate of Xm3/h, through Y parallel tubes in the heat exchanger. The diameter of the tubes is Zcm and the length of the tubes is Am. The solution viscosity is 103kg/ms, density is 1010kg/m3, heat capacity is BkJ/kgC, and thermal conductivity is CW/mC. Please calculate the heat transfer coefficient