To help you out, you should draw a punnet square: and as you can see, here are our results from crossing the two
WW
WW
Ww
Ww
Since all of them have the big W (wrinkled seeds) which is the dominant trait, all of the crossed plants will be wrinkled seeds! The only way for the plants to have smooth seeds is if when we do the crossing, one of the answers is two small w's. Therefore, the answer is 4:0 (wrinkled to smooth)
WW
WW
Ww
Ww
Since all of them have the big W (wrinkled seeds) which is the dominant trait, all of the crossed plants will be wrinkled seeds! The only way for the plants to have smooth seeds is if when we do the crossing, one of the answers is two small w's. Therefore, the answer is 4:0 (wrinkled to smooth)