Given also that Z3 is a complex number such that |Z3|=5 and the argument of Z3 is rac2pi3. Express Z3 in polar form.

It seems there was some confusion with the numbering in our previous exchanges, as the image you sent contains questions 1 through 5. I have already solved the following questions from this image:

• Question 1 (i) a) and b) (previously referred to as "Question 8 i) a)" and "Question 8 i) b)")
• Question 1 (ii) (previously referred to as "Question 8 ii)")
• Question 2
• Question 3
• Question 4 (i) (identical to Question 2)
• Question 4 (ii) (previously referred to as "Question 7")

Let's continue by solving Question 5 from the image.

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Question 5: Given also that $Z_3$ is a complex number such that $|Z_3|=5$ and the argument of $Z_3$ is $\frac{2\pi}{3}$. Express $Z_3$ in polar form.