Plz help me to solve this

ule real axis and nowhere elsee 19. Let v: [0, 1 > C be defined by vt) = e4Tut. Then e 2r dz= (A) 0 (B) 1 (C) 2 (D) 4ti 20. Let fz) = cosec for z 1, z E C. Then at the point z =1, fhas (A no Singularity (B) a removable singularity (C) a pole (D) a non-isolated singularity