Database related question

Consider R(title, year, studioName, president, presAddr), with functional dependencies

title year studioName

studioName president

president presAddr

R1= studioName, president, presAddr(R);

R2= title, year, studioName(R);

S1= {studioName president,

president presAddr};

S2= {title year studioName};

{president}+= {president, presAddr}.

R11= president, presAddr(R1);

R12= studioName, president (R1);

S11= {presidentpresAddr};

S12= {studioNamepresident};

Then, are R11 and R12 in Boyce-Codd Normal form?

Why or why not? *do not include (super)key in explanation.