Evaluate the following by substituting in the values shown for the unknown variables. (a) If \\( p=-3 \\), then \\[ -p^{2}= \\] (c) If \\( y=-2 \\), then \\[ \\frac{3 y-6}{-3-y}= \\] [1] (b) (b) If \\( a=-2 \\) and \\( b=2 \\), then \\[ (2 a+b)^{2}= \\] [2] \\[ (2 a+b)^{2}= \\] [2] (d) If \\( x=-3 \\), then [2] \\[ \\sqrt{\\frac{-x^{3}}{3}}= \\]