Sketch the graph of a function f for which f(0) = -1, f '(0)=0, f '(x) < 0 if x < 0, and f '(x) > 0 if x > 0

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Pls never taught i’m really confused and i rlly need