Let A ={1,2,3,4,5,6}. The number of one-one functions f: A → A such that f(1) ≥ 3, f(3) ≤ 4 and f(2)+f(3)=5, is ____.

Let $\displaystyle \mathrm{A}=\{1,2,3,4,5,6\}$. The number of one-one functions $\displaystyle f: \mathrm{A} \rightarrow \mathrm{A}$ such that $\displaystyle f(1) \geq 3, f(3) \leq 4$ and $\displaystyle f(2)+f(3)=5$, is $\displaystyle \_\_\_\_$.