Tag questions

Hello Guys please help me with this:

Q//Indicate, by a, b, c or d, whether the tag questions below can be classified as:

a_ positive assumption + neutral expectation

b_ negative ,, + ,, ,,

c_ positive ,, + positive ,,

d_ negative ,, + negative ,,

1_I signed the cheque, didn’t I?

2_ I put in the date, didn’t I?

3_ I didn’t forget, did I?

4_ It’s all right now, isn’t it?

5_ It’s terrible weather, isn’t it?

6_ It was worse yesterday, wasn’t it?

7_ You can all understand, can you?

8_ You haven't eaten a thing, have you?

9_ John's grown a lot lately, hasn’t, he?

10_ There's a meeting this evening, isn't there?

11_ We must go to it, mustn't we?

12_ We mustn't be late, must we?

13_ You couldn't lend me any money, could you?

14_ Woolley's sell watches, don't they?

15_ And your father wouldn't buy you one, would he?

16_ You slipped a watch into your pocket, didn't you?

17_ The shop assistant wouldn't believe you, would he?

18_ You don't expect me to believe that, do you?

19_ You shouldn't have said that, should you?

20_ That's all for now, is it?