c) I spent a sabbatical at the University of Minnesota in 2018. When my wife and I arrived in August, when we unloaded the rental truck the air temperature was 92F with a 99F heat index. When I was packing the truck in January to head back to Kansas the air temperature was -25 F with a -55 F windchill, so 107F colder in actual temperature, and 154F colder in perceived temperature. iii) In the winter, I had a can of Diet Mountain Dew sitting on the bumper of the truck - it froze in about 15 minutes. So I got another one from the apartment and kept it inside the back of the truck out of the wind. About how long did that one take to freeze? (you won't believe this, but literally just as I was typing this question I heard a can of Diet Mountain Dew in my office refrigerator's freezer compartment explode - it took over 5 hours as the temperature is only a little below 32F!) iv) I went back into the apartment to get some more boxes. When I came back outside, the can in the truck was partly frozen. What were the temperatures of the can on the bumper and the can in the back of the truck at this point