Answer:
a) 0.838m
b) -17.35°
Step-by-step explanation:
Forces acting on the duck are:
x-axis: 0.13 + 0.16*cos(-56°) = 2.7 * ax => ax = 0.0813 m/s^2
y-axis: 0.13*sin(-56°) = 2.7 * ay => ay = -0.0491 m/s^2
The displacement on the x-axis:

X=0.8m
The displacement on the y-axis:

Y=-0.25m
Now, the magnitude and angle of this displacement [0.8,-0.25] is:
0.838m at an angle of -17.35°