Verified answer

1) y = 63

y' = (63)' = 0

2) y = x

y' = (x)' = 1

3) y = 12x

y' = 12 * (x)' = 12

4) y = x⁴

y' = (x⁴)' = 4x⁴⁻¹ = 4x³

5) y = 5x⁵ + 11

y' = 5(x⁵)' + 11' = 5 * 5x⁴ + 0 = 25x⁴