For the sequence: $7, -2, -11, -20, …$

1. Find t$(40)$, the $40$^th term.

   Hint (a):

   $t(n) = -9n + 16$

   Answer (a):

   $t(40) = -344$

2. Find $S(40)$, the sum of the first $40$ terms.

   Hint (b):

   Use the summation formula:

   $S_{40}=\frac{40(t(1)+t(40))}{2}$