Can anyone help this problem, thank you very much

i) For each of the following health systems or countries, indicate if it is a single payer regime or a multiple payer regime: US Medicare, Taiwan, Germany, and Norway. (4 points) ii) Explain briey, in less than 100 words, how risk adjustment may solve some adverse selection problems. Hence, explain Why risk adjustment tends to be used in multiple payer systems. (6 points)