Fine an expression for the nth term of each sequence
a) 4, 7, 10, 13, 16, 19, ...
b) 12, 17, 22, 27, 32, ...
c) 5, 15, 25, 35, 45, ...
d) 4, 0, -4, -8, -12, ...
e) 10, 8, 6, 4, 2, ...
f) 14, 15, 16, 17, 18, ...
g) 25, 20, 15, 10, 5, ...
h) 100, 98, 96, 94, 92, ...
I got 6 minutes to hand it in plz help :(