q: Portfolio: Imagine you are Joseph Montgolfier. King Louis XVI has agreed on the first manned hot-air balloon flight. Use the information in the text on p. 42 to write a letter to Jean-Francois, a friend of yours, explaining what has happened and asking him to take part in the first flight with human passengers. a: Dear Jean-Francois, We finally made it. The first manned hot-air balloon flight is ready to happen. We made it from paper and fabric. To make it float, we used hot air. The first passengers were a sheep, a duck, and a rooster. King Louis XVI and I are confident this will work. The king has agreed to support this endeavor. Would you like to join me for the first human flight? Best regards, Joseph Montgolfier.