PHP Programming for DB connection a. To connect to a database with a php program, given the hostname is "localhost", username is "ericwei", password is "bmccu", db_name is "db350" what is the database connection statement in php if the returning value assigned to a variable $dbc? ( b. If the returning value of database connection statement is assigned to $dbc, what is the statement to execute a database selection statement "SELECT * FROM Customer;" for a returning variable of $r? ( c. If there are more than one records returned from the server, what is the PHP statement to loop through all the records and print out the column of first name on the client side? ( d. Normally where you store the database connection php file? Why? (