All in MATLAB please!!!

Problem 5. A compound A will be converted into B in a well-mixed reactor. The product B and unreacted A are then purified in a separation unit. Unreacted A is recycled to the reactor. A BSE engineer has found that the initial cost of the system is a function of the conversion xa. Find the conversion that will result in the lowest cost of the system. C is a proportionality constant. Cost = Cl( - )0.6 + 6(--)0.61 (1-%)2