#### Answer

elements of universal set: {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday}
elements of A: {Monday, Wednesday, Sunday}
Complement of A: {Tuesday, Thursday, Friday, Saturday}

#### Work Step by Step

The universal set has all elements. Set A only has days that have the letter 'n' in them. If you remove all of the elements of set A from the universal set, then the remaining elements create A complement.