I need help, please:)

An investment advisor currently has two types of investments available for clients: a conservative investment A that pays 7% per year and investment B of higher risk that pays 15%. Clients may divide their investments between the two to achieve any total return desired between 7% and 15%. However, the higher the desired return, the higher the risk. How should each client listed in the table invest to achieve the desired return? How much money should Client 1 invest in each account to achieved the desired return? Amount in investment A: Amount in investment B : How much money should Client 2 invest in each account to achieved the desired return? Amount in investment A Amount in investment B : How much money should Client 3 invest in each account to achieved the desired roturn? Amount in investment A : Amount in investment B