Question 1 Ahmad invested his inheritance of RM 12,000 in three different banks: part in Bank A fund paying 3% interest annually; part in Bank B paying 4% annually; and the rest in Bank Cis paying 7% annually. Ahmad invested RM 4,000 more in Bank C than he invested in Bank B. The total interest earned by Ahmad in one year is RM 670. By using the appropriate method in solving systems of linear equations in matrices, construct the system and evaluate on how much is the value of investment in each type of funds. Hint: Gaussian, Cramer's, Adjoint (20 marks)