Let \(\vec{v} = \langle 1, -2, 1 \rangle\) and \(\vec{u} = \langle 2, c, 6 \rangle\).
A. Find the value of the scalar c so that \(\vec{v}\) and \(\vec{u}\) are perpendicular, or state that no such value exists by entering DNE.
c =
B. Find the value of the scalar c so that \(\vec{v}\) and \(\vec{u}\) are parallel, or state that no such value exists by entering DNE.
c =
Please enter exact numeric values, with reasonable simplifications, eg: 3^2 = 9, sqrt(4) = 2, (-1)^2 = 1, 2/4 = 1/2, &etc.