Music Theory 2

Good morning David. I don't quite understand a matter of Theory 2. When you talk about the third position in section 3 (Doric mode) you literally say that: Another way to think of it—and the most common way to think of it—is towrite the Major Scale and then lower the 3rd and the 7th Scale Degrees by half step.In exercise 3.2, when it is necessary to write the Dorian scale in D, A, E and B, the fourth degrees do not remain as notes with a sharp.For example, in the D major scale, the sharps are: F, C, G. In the Doric, you have to lower the F (3rd degree) and C (7th degree) half a tone, but the G would continue as a sharp. However in the results of the exercises in section 7, it appears as G and the same is true for the A, E and B scales.I am doing something wrong? Please, can you explain it to me?Thank you very much.