please answer!!!

Problem 1 (20 pts} Find out how many degrees of freedom are associated with the residual in the ANDVA or ANCDVA (whichever is appropriate) table for the following scenarios. (a)I A randomized block design with 5 blocks and 5 treatments. {In} A threeway layout with three replications {n = 3. i.e. every level combination conducted three times) and three factors I'LBjC. where Ail? are threelevel factors and C is a fourlevel factor. (c) In addition to the same layout as in (b). there is a covariate I. (d) A 4 x 4 Latin square design