Corrosion fatigue was identified in a boiler pipe made of medium carbon steel, at locations where the pipe experienced expansion and contraction during thermal cycles. Given the yield strength of the steel is 250 MPa and referring to SN curves in Figure above, determine whether the steel pipe can withstand cyclic load of 150MPa after one million cycles and Explain possible mechanisms of at least (3) types of corrosion that might occur on light pole made of steel whose structure is partially buried underground