When Anton learned to read Braille, he read 12 words per minute. Six weeks later he could read 50% faster. Two months later, he increased his speed by 50%again. How many words per minute could he read?

If the angle bisectors of a pair of opposite angles of a quadrilateral are the opposite sides of a parallelogram formed by the two angle bisectors and two sides of the quadrilateral, is the quadrilateral always a parallelogram? explain your answer.