Question: I need help with this Grade class below I have included the specifications for the grade class. Also, I have included what I have so

I need help with this Grade class below I have included the specifications for the grade class. Also, I have included what I have so far. Thank you

specifications for the grade class. Also, I have included what I have so far. Thank you -key java.lang.String -value: java.lang.Double +Grade(key : java.lang.String) (exceptions

-key java.lang.String -value: java.lang.Double +Grade(key : java.lang.String) (exceptions lllegalArgumentException) Grade(key : java.lang.String, value : double) (exceptions- lllegalArgumentException) +Grade(key : java.lang.String, value : java.lang.Double) (exceptions- lllegalArgumentException +getKey0:java.lang.String +getValue): java.lang.Dou ble +toString(): java.lang.String

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