Greying out of Rows and Conditional Displaying of Rows

Hi everyone,

I hope this email finds you well! I have a spreadsheet that I'm trying to insert two (2) types of functions into:

1-I would like the ability to define a range of categories in a column (example: A2:A15) and if 3 values are present in a row in that range (Example: Rows 3, 8, 9), then all remaining rows in that section are greyed out (in this example, row 2, 4-7,9-15).

2-I would also like the ability to have hidden rows displayed if I insert a specific value into a cell elsewhere in the sheet. For example, if I insert the text value (not case specific) of A, B, or C into a cell, then rows 100, 101, and 102 are displayed.

Another element of the greying and/or displaying rows would be the parameters of the rows would be constrained within a column range. So, utilizing the first example, instead of it being row 2, it would be A2:I2, A4:I4 and so on.

I am a beginner with VBA and so I may need a bit of patience, but thanks in advance!

hi wideboydixon
Here are answers and a sample spreadsheet:
1st set:
A) defining range can be in code or wherever it makes sense. whatever is simplest is probably best.
B) similar to the range, the values can be defined in code or wherever makes sense.
C) there are other values; i created a dropdown with about 6 values. However, I wanted to have the option (in terms of the functionality here) to place any value in the cells to initiate the response.

2nd set:
A) the cell elsewhere on the sheet is part of a dropdown column where users will insert data. in the example attached, it's the 'grade dropdown' column.
B) there are other values; i created a dropdown with about 6 values. However, I wanted to have the option (in terms of the functionality here) to place any value in the cells to initiate the response.
C) in my example sheet, A17:E17 and A18:E18 are the rows that would be hidden.

the column reference for the first set is d2:d16

OK, thank you and thanks for your patience.
To be sure, to apply this, I will need to go to the developer menu and add a module using VBA? or are you identifying another way to make this happen?

Thanks a ton! I really appreciate your help. I'm trying it out now.