What building and classroom was Emma Gonzalez in during the February 14th shooting at Marjory Stoneman Douglas High School?

"She hid in the auditorium"
https://www.cnn.com/2018/03/25/us/emma-gonzalez-what-you-need-to-know-trnd/index.html

The auditorium is not in Building 12
https://www.washingtonpost.com/graphics/2018/national/florida-school-shooting/

But we should praise the police actions with the students at February 14th shooting at Marjory Stoneman Douglas High School.
Telling the students to turn off their F*cken phone so they could not record their incompetence and leading them out as they were criminals with their hands behind their heads because Officer Safety is paramount.