PLS I AM IN NEED! WILL GIVE BRAINLIEST, POINTS, VOTE 5, AND THANKS HURRY

Part A: The sun produces 4.1 ⋅ 1033 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 1.15 ⋅ 105 seconds? Show your work. (5 points)

Part B: Which is the more reasonable measurement of the diameter of a human hair:
1.95 ⋅ 10−2 mm or 1.95 ⋅ 102 mm? Justify your answer.