please do asap. I need python code. this is basic python.

7. Write a program in Python to remove all characters from a string except integers. Str=" Johnny is 19 years old and his weight is 45kg." Expected output: 1945 8. Write a function called remowood() that takes a number. 1. If the number is divisible by 3 , it should return "remo". 2. if the number is divisible by 5 ,it should return "wood" 3. if the number is divisible by both 3 and 5 , it should return "remo_wood" 4. otherwise, it should return the same number as it is. 9. Write a program to print the following start pattern using the for loop- 8888888888888888888888888