In 44–55 indicate which of the functions in the referenced exercise are one-to-one correspondences. For each function that is a one-to-one correspondence, find the inverse function.Exercise 21Reference:Let S be the set of all strings of 0’s and 1’s, and define l: S ? Znonneg by l(s) = the length of s, for all strings s in S.a. Is l one-to-one? Prove or give a counterexample.b. Is l onto? Prove or give a counterexample.

Exercise and Psychological well being Exercise, anxiety and depression Regular exercise is associated, not it is not a CAUSE and EFFECT relationship, for reducing anxiety and depression Acute effects of exercise are immediate, but temporary lasting 2 to 48 hours after exercise Chronic effects of exercise are long lasting changes overtime Aerobic exercise: more long term that trains the heart and...