solution of resultant displasement move toward 1.5m east then 2m south and then 4.5m toward east

Answer 1

X = Hor = 1.5 + 4.5 = 6 m.
Y = Ver. = -2 m.

tanA = Y/X = 6 / -2 = -3
A = -71.6 Deg. = 360 - 71.6 = 288.4 Deg.
CCW.

R = X/cosA = 6 / cos288.4 = 19 m. @ 288.4 Deg. = Resulting displacement.