MATH HELP!!! What is the next number is each of these sequences.....?

Question

20, 23, 28, 14, 17, 22, 11

18, 9, 11, 14, 7, 9, 12

thanks

Answer 1

i think for the second one its

divide by 2 add 2 add 3 then divide by 2 add 2 add 3

it seems to work

Answer 2

14....the sequence is add 3, add 5, divide by 2, repeat

6... the rule is divide by 2, add 2, add 3, repeat

Answer 3

First one: the formula seems to be +3, +5, -14(-1 each time)

So: 14, 19, 7, 10, 15, 4

Second: Seems to be divided by 2 and then add 2(+1 each time)

So: 6, 10, 5,