A phycоlоgist is interested in determining the prоportion of аlgаe sаmples from a local rivulet that belonged to a particular phylum. A random sample of 50 algae was obtained and each alga was categorized as either being cyanobacteria or not. It was found that 19 were, in fact, cyanobacteria. What is the point estimate for the proportion of algae that are cyanobacteria?