Which of the following illustrates the truth value of the given statements? a square root of 16 is 4, and the only square root of 9 is -3. t f → f t t → t f t → f f f → f the intersection of two planes is a point, and two lines intersect in a point. t t → t f t → f t f → f f f → f the alphabet has 28 letters, and a week has seven days. t t → t t f → f f f → f f t → f