State whether each of the following is true or false and explain why. (a) The expansion of the universe is currently decelerating due to the combined grav- ity of all of its mass. (b) Despite the term "Big Bang Nucleosynthesis", no elements heavier than Beryllium were formed in the first 3 minutes after the Big Bang. (c) We know that the Milky Way is at the center of the universe because galax- ies appear to be receding in every direction and because the Cosmic Microwave Background radiation is coming towards us from a sphere of radius 13.8 billion light-years centered on our location