(a) From $4k + 1 = 13$, we get $4k = 12$, so $k = 3$. Substituting: $8(3) + 2 = 24 + 2 = 26$. (b) From the equation $4k + 1 = 13$, subtracting 1 from both sides gives $4k = 12$. (c) From $4k = 12$, dividing by 4 gives $k = 3$. (d) Substituting $k = 3$: $4(3) - 1 = 12 - 1 = 11$. (e) Substituting $k = 3$: $-(3) - 2 = -3 - 2 = -5$.