Double fertilize(double stock, double amount)
double restock(double stock, double amount)
a) Option 1: double fertilize(20.0, 5.0)
b) Option 2: double restock(30.0, 10.0)
c) Option 3: double fertilize(15.0, 3.0)
d) Option 4: double restock(25.0, 15.0)