Refer to the screenshot below. What function can be used in cell G3 (and then copied through the range G3: L9) to summarize the total number of transactions (assume that each row in the dataset represents one transaction) by month and salesperson? Again assume that the three columns of the dataset have been named Name, Month, and Units sold. =COUNTA (Name, existF3, Month, Gexist2) =COUNTA (Name existF3, Month-Gexist2) =COUNTIF (Name, existF3, Month, Gexist2) =COUNTIF (Name-existF3, Month-Gexist2) =COUNTIFS (Name, existF3, Month, Gexist2) =COUNTIFS (Name-existF3, Month-Gexist2)