Answer:
The magnetic field in x axis is 0.
The magnetic field in y axis is
.
The magnetic field in y axis is
.
Step-by-step explanation:
Given that,
Speed 
(a). For position (1,0,0),
A proton moves along the x-axis and the position of the particle is in x axis so the angle is 0°
We need to calculate the magnetic field
Using formula of magnetic field



(b). For position (0,1,0),
A proton moves along the x-axis and the position of the particle is in y axis so the angle is 90°
Using formula of magnetic field



(c). For position (0,-2,0),
A proton moves along the x-axis and the position of the particle is in -y axis so the angle is 270°
Using formula of magnetic field



Hence, The magnetic field in x axis is 0.
The magnetic field in y axis is
.
The magnetic field in y axis is
.