Input Array - Loop thru rules

I have an input (from a calling API) that contains all credit card accounts for a user and a decision to be made whether an email needs to be sent. Note: A given user can have more than 1 credit card account for a given issuer. the input structure is like this
{
[{“AccountNo”: 123456,
“OutstandingAmt”: 5000,
“DaysOutstanding”: 48,
“FICO”: 679},
{“AccountNo”: 56789,
“OutstandingAmt”: 1000,
“DaysOutstanding”: 55,
“FICO”: 620}
]
}

The Email trigger (Decision) is:
IF (OutstandingAmt>4000) AND (DaysOutstanding>45) and (FICO < 680)
TriggerEmail = TRUE

Expected output response from API:
{
[{“AccountNo”: 123456,
“OutstandingAmt”: 5000,
“DaysOutstanding”: 48,
“FICO”: 679,
"TriggerEmail:: TRUE
},
{“AccountNo”: 56789,
“OutstandingAmt”: 1000,
“DaysOutstanding”: 55,
“FICO”: 620,
"TriggerEmail:: FALSE
}
]
}

QUESTION: How do I loop thru the input array and invoke the Decision multiple items as I iterate through the input array?