33.2 This exercise could have appeared just as easily in §4. Let S be a nonempty bounded subset of R. For fixed c > 0, let cS = {cs : s ∈ S}. Show sup(cS) = c · sup(S) and inf(cS) = c · inf(S).

Which of the following questions describes the equation g + (-4) = -5? a)what number, when added to negative four, is equal to negative five? b)what number, when added to negative five, is equal to negative four? c)what number, when subtracted from negative four, is equal to negative five? d)what number, when subtracted from negative five, is equal to negative four?