2 pls answer quickly

(20) A process engineer is trying to improve the life of a cutting tool. He has run a 23 experiment using cutting speed (A), metal hardness (B), and cutting angle (C) as the factors. The data from two replicates are shown in the table below. Replication Run I II (1) 221 311 a 325 435 b 354 348 ab 552 472 C 440 453 ac 406 377 bc 605 500 abc 392 419 a. Calculate the main factor contrasts and main factor effects for A and B. b. Calculate the two-factor and three-factor contrasts and interaction effects for BC and ABC. c. What are the regression coefficients for the terms in (a) and (b)? d. Which combination of factors gives the maximum tool life, and what is the estimate for this maximum tool life