Assume that A, B, and C are floating-point numbers expressed in IEEE single precision floating-point format and that floating-point addition is performed. 

If A = 2⁴⁰,  B = -2⁴⁰, C = 1, then
(a) What is A + (B + C)? (B + C is done first, and then A is added to it.)
(b) What is (A + B) + C? (A + B is done first, and then C is added to it.)