1.A mapping from N\mathbb{N}N to N\mathbb{N}N is defined as f:N→Nf : \mathbb{N} \to \mathbb{N}f:N→N, f(n)=(n+5)2f(n) = (n+5)^2f(n)=(n+5)2, n∈Nn \in \mathbb{N}n∈N. Thena.fff is not one-to-oneb.fff is ontoc.fff is both one-to-one and ontod.fff is one-to-one but not ontoLogin to continueOnly logged in users canattempt or see the solution.