How would i do this

where each number indicates the term frequency (TF) of a term (column) in a document (row). Given this collection of 5 documents, your need to use proper Excel formula to calculate document frequency (DF) and TF-IDF. Hint: For cells in Row 11, you can use the COUNTIF() function. For cells in Rows 1418, make good use of relative and absolute cell references when creating your formula