Take Example 1.3.3 with the same numbers: 89 degrees at t = 0, 85 degrees at t= 1, and ambient temperature of 22 degrees. Suppose these temperatures were measured with precision of +0.5 degrees. Given this imprecision, the time it takes the coffee to cool to (exactly) 60 degrees is also only known in a certain range. Find this range. Hint: Think about whh kind of error makes the cooling time longer and what shorter.