Was a mexican artist renown for his frescoes.

David Alfaro Siqueiros was a Mexican artist who is famous or popular for his frescoes.
Daavid Alfaro Siqueiros, Diego Rivera and Jose Clemte Orozco are the three who established Mexican muralism. 
Fresco is a method for painting pictures and it is a sort of painting or we can say that a work of art that is done on a wall, and in some cases wall painting is also mistakenly called a fresco. The word fresco originates from the Italian which means fresh.

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"