Name all the haploid cells present in an unfertilised mature embryo-sac of a flowering plant. Write the total number of cells in it.

Explanation

To answer the question regarding the haploid cells present in an unfertilized mature embryo sac of a flowering plant, let's break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Structure of the Embryo Sac**:
- The embryo sac is a female gametophyte found within the ovule of flowering plants. It typically contains several types of cells.

2. **Identifying the Types of Haploid Cells**:
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