A reciprocal of a quadratic function has the form f(x)=\frac{k}{(x-r)(x-s)}, k \in \mathbb{R}, k \neq 0 \text {. The } graph is shown as below. If r =-2, s =2, and the minimum value off (x) is 0.8 over the interval -2 < x <2. Determine the value of k, rounded to one decimal place. Show your work by attaching file