Use 123456 six digits to form six digits without repeated digits (1) how many are adjacent to 135 (2) how many are odd digits and even digits alternating?

Use 123456 six digits to form six digits without repeated digits (1) how many are adjacent to 135 (2) how many are odd digits and even digits alternating?

1. Let's take 135 as a whole a, and use a, 2, 4 and 6 to form numbers without repetition. It's 4 * 3 * 2 * 1 = 24 kinds
There are 3 * 2 * 1 = 6 kinds of A-135
So the answer is 24 * 6 = 144
2. When odd numbers rank first, there are 3 * 2 * 1 odd numbers and 3 * 2 * 1 even numbers, so there are 6 * 6-36 odd numbers
When even number comes first, there are 36
So 36 + 36 = 72