2. SQL (30 Pts) Based on the following DB: Performers Cname, genre) Nominations (name, category, year, is_winner Performers Grammy_Nominations genre Rock A&B Rock A&B Rock name is_winner category New Artist Rock Performance Album of the Year year 2013 2013 2013 2013 2013 2009 2009 2012 2013 Arizona Shakes Arizona Shakes Frank Ocean Frank Ocean Arizona Shakes Frank Ocean The Black Keys Rock Album Album of the Year Rock Performance Rock Performance The Black Keys yes 1) Write a SQL query to find out how many Rock performers. (4 Pts) COUNT(*)