2. 2.1. What is the result of executing the following XQuery? for $m in 1 to 10 let Sn = $m + 1 where $m > 4 order by $m descending

return $m*$n 2.2. Using the XML Document below (library with books), define the following queries in XQuery: (a) Give the titles of all Books sorted by Price. (b) Give the sorted list of titles of all Books that have a price with a value that is higher than 70. (c) Give the list of titles of all Books published by Addison-Wesley. (d) How many books were written by Abiteboul? (e) Give for each author, the number of books he has written.