I need some help on about five questions... The first two I need to find a quadratic equation that has the give roots:

The first question: 3/4, 9/2

The second question: -0.25, 0.25

Then next three I need to write each equation in the form f(x) = a(x-h)^2+k (unless it's not already in that form). I need to name the vertex, axis of symmetry, and direction of opening for the graph of eahc quadratic function. Then I need to graph it.

The third question is: f(x)=a(x-5)^2-7

The fourth question is: f(x)= -9^2+54x-8

The fifth (and final) question is: f(x)=0.25x^2-6x-16

Please Help!! :?