Vector \(\vec{A}\) points to the right, as does the positive \(x\) axis.

(a) Express this vector in unit vector notation.

(b) Now flip \(\vec{A}\) to the opposite direction. Express it in unit vector notation.

(c) Keep the vector in its new direction and flip the \(x\) axis so that the positive direction is to the left. Express the vector in unit vector notation.