Try to find out a 5-digit number that fits all the conditions below:

The sum of all five digits is 18.

The 1^{st} digit is 3 smaller than the 2^{nd} digit.

The 3^{rd} digit is 2 times the 2^{nd} digit.

The 4^{th} digit is 4 smaller than the 2^{nd} digit.

The last digit is 5 times the 1^{st} digit.