According to Gertrude how did Ophelia drown? Also, how does Laertes react to her death? Find a direct quote by Laertes to support your answer.

Ophelia drowned in a small brook. He puffy clothes soaked in the water and dragged her to the bottom. Laertes is incensed. With the King's advice, he blames Hamlet for all the disaster that has befallen his family.