Let a and b be real numbers. Find all vectors {3,a,b} orthogonal to {3,9,9}. What are all the vectors that are orthogonal to {3.9.9}? Select the correct choice below and, if necessary, ll in any answer boxes within your choice. O 15- Vectors of the form {3,a,b}, where (a,b) = (Type an ordered pair. Use a comma to separate answers as needed.) O 3- Vectors of the form {33.3, where a is any real number (Type an expression using a as the variab e.) O C. There are no vectors of the form {Bab}, where a and b are real numbers