i am confused please help

1 [Maximum Marks: 7] Jasmine inherits $8000. She chooses to invest it in a bank account which offers 3.8% interest per annum, compounded monthly. (a) Calculate how much her investment will be worth after 5 years. Give your answer correct to the nearest dollar. [3] At the same time, she invests $1000 in an account which offers 6.1% interest per annum, compounded quarterly. (b) Find how long it will take for this investment to double. [4] 2 [Maximum Marks: 7] The graph of the quadratic function f(x) = ar? + br + c has its vertex at the point A (1, 7) and crosses the y-axis at the point B (0, 2). (a) Write down: (i) the equation of the axis of symmetry. [1] (ii) the value of c. [1] (b) Find the value of a and the value of b. [5]