Write the function rollLoaded() that simulates a loaded six-sided die: it returns an int from 1 to 6, where a 6 is three times as likely as each of the other faces, and the faces 1–5 are equally likely. Use the random module; every call must be a fresh random roll.
Over many rolls, about 3 in 8 should be 6's and about 1 in 8 should be 1's.