Frigidaire dishwasher door problem

hi, my [FONT=&quot]dishwasher door just drops down completely and I found only 1 left door broken spring.

How many spring are needed for holding the door ?

Are they easy to replace?

what is the correct part number for the door spring of the Frigidaire Model FDB421RFR4?
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Here’s the parts breakdown Replacement parts for FRIGIDAIRE FDB421RFR4 | AppliancePartsPros.com

There should be a spring on both sides of the door.