[Solved] Use set notation to represent each of the following. -The universal set of positive odd numbers. Control Group: In experimental research, the group of subjects that does not receive the treatment or experimental manipulation, serving as a baseline to compare the effects. Experimental Group: is the group in an experiment that receives the variable being tested, allowing researchers to observe the effects of that variable. Sexual Thought: Mental reflections or fantasies about sexual activity or erotic situations. Explicit Sexual Content: Material that depicts sexual activities or genitalia in a very direct and clear manner, intended for adult audiences.