(a) Suppose a van is traveling E on Cobblestone Way and turns onto Winter Way heading NE. What is the measure of the angle created by the van's turning? Explain your answer. (b) Suppose a van is traveling SW on Winter Way and turns left onto River Road. What is the measure of the angle created by the van's turning? Explain your answer. (c) Suppose a van is traveling NE on Winter Way and turns right onto River Road. What is the measure of the angle created by the van's turning? Explain your answer.