I've only one attempt left. Please provide me with the correct answer. Thank you

a) Write the objective function to be maximized. P= b) The feasible region has 3 corner points. List the three points: Corner points: c) Determine the amount to be invested in each bond to maximize the return and determine the maximum return: Amount to be invested in type A bonds: $ Amount to be invested in type B bonds: $ Maximum return is: $