Citrus fruits are very susceptible to cold weather, and extended exposure to subfreezing temperatures can destroy them. Consider an 8 -cm-diameter orange that is initially at $15^{\circ} \mathrm{C}$. A cold front moves in one night, and the ambient temperature suddenly drops to $-6^{\circ} \mathrm{C}$, with a heat transfer coefficient of $15 \mathrm{~W} / \mathrm{m}^2 \cdot{ }^{\circ} \mathrm{C}$. Using the properties of water for the orange and assuming the ambient conditions to remain constant for 4 h before the cold front moves out, determine if any part of the orange will freeze that night.