im writing an essay because i was sick during one of the concerts, this is what i have as of now  
"The viola is similar to the violin in shape and construction. The viola has no definate full size, but an average viola is about 16 inches. A child viola is about 12 inches, but a vola could be 20+ inches. Differences between the two are the size and sound of the viola, also the fingering is more like the Cello's. Unlike the violin, the viola has the strings A, D, G and C. A being the highest string and C being the lowest. But unlike either the Celo or the Violin the Viola has an Alto clef, or a C clef because of the clef symbol is located on the 'c' line of the staff. Violas were made in as early as the 1500's. Both Bach and Mozart were accomplished violists in the 1700's. Jimmi Hendrix also started his musical carreer with the viola at a young age. Many people think that the viola isn't as good as the violin, but some violists and historians think that the viola might have actually appeared before the violin. "