Evaluate each function at the given value. Show your solutions. 1) f) =-r'+6x-7 at x=2 2) f=r+x-5x-6 at x 2 3) f(a) =a'+3a + 2a +8 at a=-3 4) f(a) = a' + Sa' + 10a + 12 at a= -2 5) f(a) = a+ 3a - 17a + 2a -7 at a= 3