You need ask whomever is assigning this task for their definition of "folio" in this usage.
"Folio" traditionally never means type size or anything related to type size. The only possible use of the word "folio" in relation to type, is page numbering. Sometimes page numbers can be referred to as "folios". Otherwise, "folio" revers to the actual pages, i.e. sheets of paper/stock.
Folio is also the name of a typeface from Linotype... So, it's feasible that all those specifications are as they relate to the Folio typeface specifically.