Sam solved the proportion3 = 5, but she has some mistakes in her solution. read her steps carefully, and then answer the questions. step 1: (x + 5)1 = 4(x + 2)step 2: x + 5 = 4x + 8step 3: 5 = 3x + 8step 4: 3= 3xstep 5: -1=1millpart a: in which step did sam make her first mistake? part b: what is sam's first mistake? select one answer for part a, and select one answer for part b.