If point e is the midpoint of segment ac and point d is the midpoint of segment bc, which expression represents the value of s?
triangle cab, point e is on segment ac between points a and c and point d is on segment bc between points b and c, creating segment ed, ce equals p, ea equals r, cd equals q, db equals t, ed equals s, and ab equals u
s equals p over q
s = one half u
s equals q over p
s = 2u