How many numbers are there between 6000 and 7000 which have exactly one of their digits as 7

Use 1, 2, 3,4,5,6,7,8 to form 6-digit numbers. The two even digits cannot be next to each other. How many numbers can be formed in this way?

5) Find 9 sequential composite numbers.

A bicycle wheel rotates 400 times per minute. If the rider removes his feet from the pedals, the wheel will start to slow down. Each minute, it will rotate only as many times as in the preceding minute. How many 4 times will the wheel rotate in the eighth minute after the rider's feet are removed from the pedals? The wheel will rotate about times in the eighth minute. (Round to the nearest integer as needed.)