1. Negate the following statements:
(a) Isaac Newton and Henry Ford invented the calculus.
(b) James Galway or Paul Simon plays the piano.
2. For each of the following statements, give the contra positive and determine its truth value.
(a) If the sum 2 + x is an odd number, then x is odd.
(b) If a computer keyboard has the QWERTY layout, then "S" is not next to "K."