For Problems 11 to 14, use the comparison test to deter mine whether the integrals are convergent or divergent 1 1+ex oo dx cos x 13. COs 14. 1 1.01 +2 For Problems 15 to 18, find the CDFof the given PDF 15. f(x)=(1+ex)2 16. f(x)=-e-m 17. f(x)-x2 for x > 1 and f(x) 0 otherwise 18. f(x)= (1+92 for x et 20 and f (x) = 0°therwise For Problems 19 to 22, find the PDFof the given CDF 19. F(x)- 1 + e-x 20. F(x) = 0 for x 1 and F(x) = 1-1 for x > 1 21. F(x) = ex for x