Just before 6pm, students enter the classroom to find Mr Fie

Just before 6pm, students enter the classroom to find Mr Fies dead of an apparent homicide (everyone said they saw it coming).  At 6, the temperature of the body is ! , while at 7pm it was ! (it took a while for the campus police to get through the party).  If the room is kept at a constant temperature of 70 degrees, Fahrenheit, what is the time of death? a.  Determine and discuss the value of k. b.  Determine and discuss the (approximate) time elapsed, to the nearest tenth, from time of death to time of discovery. c.  Determine and discuss the (approximate) time of death.