2- Assume that x, y ER and z = x+ iye C and answer the followings. Calculate the reel integrals for a given countours. (Hint: Firstl consider complex form of integral For example : In section a, S. dz, show that f (...) = 1 and So...) = 0. For Sa(.…..), ind the relationship between fe (...) and I by using z=R et transform .Finally find the I thanks to 2ni E Residue = Se.c..(...) ) C2 1 dx x3+1 00 120° a- l= R Figure of section a b-l= Jx=0 x*+1 Figure of section h