Breitling Watch Deals

I need some help that anwering a couple of questions that I do not understand at all. I lost and I need someone to explain how to answer them. I got these from my teacher and he didn 't explains how to obtain a response. Questions: 1. A) The world record established dell'aerostato dell'orbita Breitling 3 of 40 in 1999 travelling 814km in 19 d, in 21 he in 47min. On 1 March 1999, the balloon removed from a village in the Swiss Alps. Finally he landed in Egypt on March 21. Calculate the average speed dell'aerostato B) Using the average speed that you have calculated in (a), which took the duration orbit 3 of Breitling to cross the Atlantic Ocean, a distance of 6670km? C) In the final route of travel round - the world, the balloon flew for 18h at an average speed of 210km / h. has traveled far?