The relationship between the body mass index (mass) and the thickness of skin folds around the triceps (triceps) in mm is studied among women of Pima Indian heritage by using a least squares regression. The following linear model is obtained: Triceps =4.8753+0.7943 mass. If the actual thickness of skin fold around the triceps is 22.98mm and the body mass index of 37.6, what is the residual? (please round your answer to 2 decimal figures.) a. +1.99mm b, +0.98mm c. +2.01mm d. 1.99mm e. 2.01mm