Today is the sixteenth birthday party for Roberta and her twin brother. Their younger brother, age 14, and older sister, age 19, are in attendance. The modal age of the children in this family is .

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

the answer is solomon northrup. he was a free-born african american, abolitionist and professional violinist that was drugged, kidnapped and sold as slave in 1841 and remained in captivity until 1853 where he regained his freedom with the of the then-governor of new york, washington hunt. he wrote and published his memoirs "twelve years a slave" in 1853, and in this text, he tells the story of his escape thru one of louisiana's swamps (the great pacoudrie swamp) in which he ended up covered in green slime from crossing the surface of the dead water.