step by step please No old answers please

You are a controls engineer working for a big design company. One of the customers is complaining that a controller supplied by your company is broken and you are assigned to solve the problem. You figure out that by using basic knowledge of a classical methods in tuning controllers, you may be able to fix the problem. After adjusting the gain to one set of data taken from the controller, you find that your ultimate gain is 4.33. From the plot below, determine the type of loop this graph represents; then, calculate Kp,Tb and T for all three types of controllers