in matlab

Create a vector, vec, beginning at 2, incrementing by 3 and ending at 18. Create a logical indexing vector, idx, of true, false, false true, true, false, true, true, true, and false. Create a new vector, newVec, that uses the idx vector as the subscript, i.e. newVec(idx), and set it equal to the original vector, vec. How many elements does the original vector, vec, contain? How many elements does the indexing vector, idx, contain? How many elements does the vevtor newVec contain?