Hello. Please write a step by step explanation of what's is going on and this problem and the solution. Thanks you for the help :)

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2. Hot drinks are safe to drink at 155 F but the optimal temperature is 135.F. Suppose you set some water to heat and forgot about it until it was at boiling temperature (212.F), and you went ahead and poured yourself a cup of tea. If your kitchen is a comfortable 70 F and 5 minutes later, the water temperature in the cup is 180 F how long does it take for your tea to cool to a temperature that is safe to drink? How long until the temperature is optimal