The fourth term of the sequence in which \( a_{1}=-5 \) and \( a_{n}=a_{n-1}-7 \) is

Step 1 ：\( a_{2} = a_{1} - 7 \)

Step 2 ：\( a_{3} = a_{2} - 7 \)

Step 3 ：\( a_{4} = a_{3} - 7 \)