Fill in the missing parts of this function, which counts the number of occurrences on the data's key attribute's value. Match the red BLANK$\_$N placeholders on the left with the valid Python syntax that should replace them to make this code correct. Assume the data.csv file exists and has the structure $($Labs$,$ Projects, Exams$)$ and rows with integer average percentage scores for each student, e$.$g$.$:

import csv

def get$\_$data$()$:

with open$(\text{'}$data$.$csv$\text{'},\text{'}r\text{'})$ as csvfile:

data $=$

reader $=$ csv$.$ DictReader $($csvfile$)$

for $[$BLANK$\_1]$:

data.$[$BLANK$\_2]($row$)$

return data

def count$\_$matching$\_$values$($data: $[$BLANK$\_3],$ key: $[$BLANK$\_4],$ value: str$)$:

$[$BLANK$\_5]$

for row in data:

if BLANK$\_6]==$ value:

count $+=1$

return count

def main$()$:

data $=$ get$\_$data