For a process in which the internal energy does not change (AE = 0), which of the following are possible? (1) heat > 0, work < 0 (ii) heat > 0, work > 0 (iii) heat < 0, work < 0 (iv) heat < 0, work > 0 a. ili and iv only b. ll and Iv only c. i and ii only d. ii and lii only e. I and ill only f. i and iv only
