Calculate and determine whether the process is endothermic or exothermic for the follow...

Calculate and determine whether the process is endothermic or exothermic for the following cases: (a) A sys-tem absorbs 105 kJ of heat from its surroundings while doing 29 kJ of work on the surroundings; (b) q = 1.50 kJ and to = —657 J; (c) the system releases 57.5 kJ of heat while doing 22.5 kJ of work on the surroundings.