KVPY SX SB Exam 2018 Question Paper

An ideal gas is made to undergo the cyclic process shown in the figure below. Let $∆\mathit{W}$ depict the work done. $∆\mathit{U}$ be the change in internal energy of the gas and Q be the heat added to the gas. Sign of each of these three quantities for the whole cycle will be (0 refers to no change)