Hi, Carol! That's wonderful that you're feeling inspired to join in the 52 Ancestor Week challenges! Here are the links to Challenges 1 through 5 for you and others who may have missed out:
52 Ancestors Week One: Start
https://www.wikitree.com/g2g/531413/52-ancestors-week-one-start
52 Ancestors Week Two: Favorite Photo
https://www.wikitree.com/g2g/536072/52-ancestors-week-two-favorite-photo
52 Ancestors Week Three: Longevity
https://www.wikitree.com/g2g/540567/52-ancestors-week-three-longevity
52 Ancestors Week Four: Invite to Dinner
https://www.wikitree.com/g2g/545520/52-ancestors-week-4-invite-to-dinner
52 Ancestors Week Five: In the Census
https://www.wikitree.com/g2g/549989/52-ancestors-week-5-in-the-census