please answer the following, and choose the correct answer in the multiple choices:

1. Separation of Variables:Solve the equation * (2 Points) dy = 2y dx x for x > 0 and y > 0 Oy = cx2 O y2 = cx 2. Separation of Variables: Solve the equation * (2 Points) (1 + y ) dx + (1 + x2 ) dy = 0, if x = 0, y=-1 O xy + x + y +1 =0 O xy - x - y - 1 =0