For Questions 19) - 20), refer to the diagram shown, which depicts a P-I plot of an ideal gas undergoing P a cyclic process. 3Po B IC 19) During which process/processes is work done D on the gas? 2PO (A) AB (B) AB, BC (C) CD, DE Po E (D) DE, EA (E) EA, AB 1 OY 20) What is the amount of work performed during the path BC? (A) -4POVO (B) + 4POV. (C) + 6POV. (D) -6POVO (E) + NIUI PoVo