Answer: The first term is
![7z^(4)](https://img.qammunity.org/2020/formulas/mathematics/high-school/t7edtlxc7vpynk95vf08ryyr1i0vivb08d.png)
Explanation:
1. To rewrite the given polynomial in descending order, you must see the exponent of each variable of the terms. Then, you must arrange the terms from bigger to smaller.
2. Keeping this on mind, you have:
![7z^(4)-8z^(3)-5z^(2)+11z](https://img.qammunity.org/2020/formulas/mathematics/high-school/a2ba6ddqm2bcrkosetidzyhtz0nmcyimab.png)
3. As you can see, the first term is:
![7z^(4)](https://img.qammunity.org/2020/formulas/mathematics/high-school/t7edtlxc7vpynk95vf08ryyr1i0vivb08d.png)