Find x-component of vector a=(4.0 , - y-direction).
Find y-component of vector a=(4.0 , - y-direction).
To find the x-component of vector a=(4.0 , - y-direction), you only need to look at the first element of the vector, which is 4.0. The x-component of vector a is 4.0.
To find the y-component of vector a=(4.0 , - y-direction), you need to look at the second element of the vector, which indicates the direction in the y-axis. In this case, it is - y-direction, which means the vector is pointing downwards in the y-axis. However, the magnitude of the y-component is not specified, so we don't have enough information to give a specific value for the y-component.