Can someone with question 1 and 2 ..

Term 3
Common difference 12

That means that you add 12 to the term, over and over again

3, 3 + 12, (3 + 12) +12, ...

That is 3, 15, 27, 39

Term 5
Common difference 1,3

Same way, we add 1,3 to the term

5, 5 + 1,3,

That is 5 , 6,3 , 7,6 , 8,9

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8