By 1979, with the establishment of the Foundation for Ancient Research and Mormon Studies (FARMS) as a California non-profit research institution, an effort led by Robert F. Smith began to take full account of Larson’s work and to publish a Critical Text of the Book of Mormon. Thus was born the FARMS Critical Text Project which published the first volume of the 3-volume Book of Mormon Critical Text in 1984. The third volume of that first edition was published in 1987, but was already being superseded by a second, revised edition of the entire work, greatly aided through the advice and assistance of then Yale doctoral candidate Grant Hardy, Dr. Gordon C. Thomasson, Professor John W. Welch (the head of FARMS), Professor Royal Skousen, and others too numerous to mention here. However, these were merely preliminary steps to a far more exacting and all-encompassing project.

Answer this question, if possible (if impossible, reply "unanswerable"): How many years did it take to publish all three volumes of the Book of Mormon Critical Text?
the first volume of the 3-volume Book of Mormon Critical Text in 1984. The third volume of that first edition was published in 1987