Problems of the day

1.

Write a maple procedure that calculates the following function of x: if x < 0 then f(x) = 1 + 2x otherwise f(x) = 1 - 2x. Plot the graph of f.

2.

Decode the following message. It was encoded using the second Caesar cipher algorithm with an offset of 3: ``WrCehCruCqrwCwrCehBCwkdwClvCwkhCtxhvwlrqA''. What letter gives the capital C's in the encoded message?