2- Assume that x, y E R and z = x + iy E C and answer the followings. Calculate the reel integrals for a given countours. a-1=fdx |= b-1=√x=x+dx C3 120° C2 C1 Figure of section a R Cz C₁ R Figure of section b (Hint: Firstl consider complex form of integral For example: In section a, Sc 23+1 dz, show that f₁₂ (...) = 1 and f₂(...) = 0. For Sc(...), find the relationship between c₂ (...) and I by using z=R e transform. Finally find the I thanks to 2πi Σ Residue = Sc₁+c₂+c₂ (...) )