InExercises45through54, determine whether or not the two conditions are equivalentthat is, whether they will both evaluate toTrueor both evaluate toFalsefor any values of the variables appearing in them.

#45. a <= b; (a

#47. (a==b) or (a

#49. not ((a==b) and (a==c)); (a != c)

#51. (a <=b) and (a <= c); not((a>b) or (a>c))

#53. ch in "abcdefghijklmnopqrstuvwxyz:; 97 <= ord(ch) <= 122