COORDINATE GEOMETRY- PARABOLAS WHOSE AXES ARE PARALLEL TO EITHER X-AXIS OR Y-AXIS

Q) The equation of the parabola is given : $ y^2-4y+4x=0 $.
Find : vertex , focus , axis , directrix.
In general , how do u find all these (as written above) in case of those parabolas whose axes are parallel either to X-axis or Y-axis?
Please show each and every step.( Do not skip any part because I'm a beginner in this section)
Urgent !!! Please !!!!!!!!

Thanks in advance!

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