9 and 11 please

9-19 CAUCHY'S THEOREM APPLICABLE? Integrate f(z) counterclockwise around the unit circle. Indicate whether Cauchy's integral theorem applies. Show the details. 9. f(z) = exp (-z2 ) 10. f(z) = tan 4z 11. f(z) = 1/(2z - 1) 12. f(z) = 23 13. f(z) = 1/(24 - 1.1) 14. f(z) = 1/z 15. f(z) = Im z 16. f(z) = 1/(7TZ - 1) 17. f(z) = 1/|z/2 18. f(z) = 1/(4z - 3) 19. f(z) = z cot z