Identify the true functions from the following.
a. n⁵ is ⊝(n⁷).
b. (log² n)⁷ is ⊝(n⁸).
c. n⁴ is ⊝(n³).
d. 3n is ⊝(n¹⁰⁰).
e. n⁸ is ⊝(3n).
f. n⁸ is ⊝(log² n)⁹.