Anne is a maths student. She has achieved marks of 9 outof 10 for tutorials and 17 out of 25 for her mid semester esam. There are two options for calculation of her final mark. Both options give Annie a final mark of exactly 72%. F=(t + a + 0.75e) F=(t + a + m + 0.5e) a) Let a be Anne's assignment mark (out of 15) and let e be her final exam mark (out of 100). Write down an equation for her final mark calculation under each option:: For that I get: 72 = 9 + a + 0.75e 63 = a + 0.75e and... 72 = 9 + a + 17 + 0.5e 46 = a + 0.5e Is that right? b) Use matrices to determine Anne's assignment mark and her final exam mark... For that i get: |1, 0.75| |1, 0.5 | and to find a and e you have to times the inverse and the fraction of ad-bc (-1/4) by 72 and 46. When I do this i get a and e to equal absolutlynothing near what they should be. Have i made a mistake somewhere??