Final answer:
Use the formula =LEFT(A6, G6) in cell H6 to extract the first name from cell A6, where G6 contains the length of the first name.
Step-by-step explanation:
To create a formula in cell H6 that returns the first name from the entry in cell A6 using the LEFT function, you need to reference cell G6 which contains the length of the first name. The formula in H6 will look like this: =LEFT(A6, G6).
Here, the LEFT function is used to extract characters from the start of the text in A6, and G6 is the number of characters to extract.