Answer:

The given set is {mango, banana, guyabano, avocado}.

**Elements**: The elements in the set are mango, banana, guyabano, and avocado.

**Subsets**: To find the subsets, we can use the concept of the power set, which includes all possible subsets (including the empty set and the set itself). Here are the subsets:

1. Empty set: {}

2. Individual elements: {mango}, {banana}, {guyabano}, {avocado}

3. Pairs: {mango, banana}, {mango, guyabano}, {mango, avocado}, {banana, guyabano}, {banana, avocado}, {guyabano, avocado}

4. Triplets: {mango, banana, guyabano}, {mango, banana, avocado}, {mango, guyabano, avocado}, {banana, guyabano, avocado}

5. Full set: {mango, banana, guyabano, avocado}

**Cardinality**:

- Zero elements: 0 subsets

- One element: 4 subsets ({mango}, {banana}, {guyabano}, {avocado})

- Two elements: 6 subsets

- Three elements: 4 subsets

- Four elements: 1 subset (the full set)

**Total Number of Subsets**:

The total number of subsets is the sum of subsets for each cardinality:

0 + 4 + 6 + 4 + 1 = 15 subsets in total.