QuestionFor the quadratic function $f(x)=x^{2}+2 x+1$, answer parts (a) through $(f)$. (a) Find the vertex and the axis of symmetry of the quadratic function, and determine whether the graph is concave up or concave down.
The vertex is $(-1,0)$. (Type an ordered pair, using integers or fractions.) What is the equation of the axis of symmetry? The axis of symmetry is $x=-1$. (Use integers or fractions for any numbers in the equation.) Is the graph concave up or concave down? Concave down Concave up (b) Find the $y$-intercept and the $x$-intercepts, if any. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The $\bar{x}$-intercept(s) is/are $\square$ . (Type an integer or a simplified Yaction. Use a comma to separate answers as needed.) B. There are no $x$-intercepts.