How did instrumental music develop during the Baroque era

#1 - How did instrumental music develop during the Baroque era?  Discuss 3 baroque composers that contributed to this development and how they contributed.  Include 1 piece from each composer that we have discussed in class, from the textbook, or from the Powerpoint only.  Do not use other pieces. 

#2 - Discuss the origins of opera during the Baroque era.  What influenced them and how did it start?  Give 3 examples of song styles or singing styles used in these operas during this time (use only examples that were discussed in the lecture, book or PPT) and explain what kind of style it is and how those examples are different from one another.