Database functional dependencies - mysql

Question

Im trying to find some functional dependencies in my database but have no idea how to do it. Would anyone be able to explain how to do it or what the functional dependencies are . Heres my code for creating my tables
CREATE TABLE Customer(
CustomerID int PRIMARY KEY,
CustomerName varchar(50) NOT NULL,
BillingAddress varchar(400) default NULL,
PhoneNumber varchar(128) NOT NULL,
UserEmail varchar(128) UNIQUE
)ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE IF NOT EXISTS OrderMaster(
OrderID int NOT NULL PRIMARY KEY,
CustomerID int,
OrderDate date NOT NULL,
PurchaseOrderNumber int
)ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE OrderItem(
OrderItemID int PRIMARY KEY,
ProductID int NOT NULL,
OrderID int NOT NULL,
Quantity int NOT NULL,
PricePerUnit double NOT NULL
)ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE IF NOT EXISTS Product(
ProductID int PRIMARY KEY,
ProductName varchar(100) NOT NULL,
ProductDescription varchar(100) NOT NULL,
SerialNumber int NOT NULL,
UnitesInStock int NOT NULL,
UnitsOnOrder int NOT NULL,
UnitPrice double NOT NULL,
SupplierID int not NULL
)ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE IF NOT EXISTS SupplySchedule(
ShippingID int PRIMARY KEY,
ShippingMode varchar(50) NOT NULL
)ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE IF NOT EXISTS Supplier(
SupplierID int PRIMARY KEY,
SupplierName varchar(40) NOT NULL,
SupplierAddress varchar(128) NOT NULL,
ContactName varchar(128) NOT NULL
)ENGINE=InnoDB DEFAULT CHARSET=latin1;