B. Find the next terms in the following patterns.
11. 8, 11, 14, 17,
12. -12, -8, -4, 0,
13. 2a, 35, 40,
14. f + 9, 2/+ 29. 4f + 49,
15.×+1_2, ×+2_3, ×+3_4, ×+4_5
plss answer
