what & how 2

[Anonymous]

Are both correct and common in each set?

4-1. What a great suggestion!
4-2. How great a suggestion!
5-1. What a suggestion!
5-2. How a suggestion!

Thanks.

[Pete]

Are both correct and common in each set?

4-1. What a great suggestion!
4-2. How great a suggestion!
5-1. What a suggestion!
5-2. How a suggestion!

Thanks.
The last one, 5-2, does not work. The other 3 sound natural.