Укажите пары значений \(\displaystyle h\) и \(\displaystyle y{\small,}\) при которых выражение \(\displaystyle \frac{h+y}{hy}\) не имеет смысла.

• \(\displaystyle h=15{\small;} \) \(\displaystyle y=0\)
• \(\displaystyle h=-19{\small;} \) \(\displaystyle y=19\)
• \(\displaystyle h=0{\small;} \) \(\displaystyle y=13\)
• \(\displaystyle h=0{\small;} \) \(\displaystyle y=0\)