How can the count_if function and counting NULL values be utilized in the following scenario?

Given a table random_values with the data below, what would be the output of this query?

SELECT 
    count_if(col1 > 1) AS count_a,
    count(*) AS count_b,
    count(col1) AS count_c 
FROM random_values

Data in random_values:

0
1
2
NULL
2
3