CREATE TABLE Manufacturers (
  Code INTEGER,
  Name VARCHAR(255) NOT NULL,
  Headquarter VARCHAR(255) NOT NULL,
  Founder VARCHAR(255) NOT NULL,
  Revenue REAL,
  PRIMARY KEY (Code)   
)

CREATE TABLE Products (
  Code INTEGER,
  Name VARCHAR(255) NOT NULL ,
  Price DECIMAL NOT NULL ,
  Manufacturer INTEGER NOT NULL,
  PRIMARY KEY (Code), 
  FOREIGN KEY (Manufacturer) REFERENCES Manufacturers(Code)
)
SELECT avg(T1.Price) ,  T2.name FROM products AS T1 JOIN Manufacturers AS T2 ON T1.manufacturer  =  T2.code GROUP BY T2.name HAVING avg(T1.price) >= 150
Select the names of manufacturer whose products have an average price higher than or equal to $150.