Its d a range that in x? [.(b) bus . 17. y = - 5 sec x 18. y = 4 sec x 19. y = sec Tx - 3 20. y = -2 sec 4x + 2 TIX - tan TX r ( 2 ) . "of S -.OF 35 - 3 -3 Library of Parent Functions In Exercises 9-28, sketch the graph graph of the function. (Include two full Periods.) Use a graphing utility to verify your result. uses IS A ta. V 15. y = 3 CSC N / 16. y = - csc WIPlace the following steps in the TH cell activation of cell-mediated and humoral immunity in the correct order. 1. TH cell secretes interleukin-2 and cytokines. 2. Macrophage engulfs pathogen and presents antigen in class II MHC. 3. Plasma cells secrete antibodies and To cells at- tack cells with class I MHC-antigen complex. 4. T cell receptor recognizes class II MHC-antigen complex. 5. Macrophage secretes interleukin-1. 6. Activated B cells form plasma and memory cells, activated T cells form To cells and mem- ory cells. a. 1, 3, 5, 6, 2, 4 b. 5, 1, 2, 6, 4, 3 c. 2, 4, 5, 1, 6, 3 d. 5, 2, 4, 1, 3, 6 e. 2, 1, 4, 5, 6, 3