URGENT 100 POINTS PLEASE HELP 2NH₃ + MgSO₄ + 2H₂O ---> Mg(OH)₂ + (NH₄)₂SO₄

1 - If I have 3.7 moles of MgSO₄ and 4.8 moles oh NH₃, which one is the limiting reactant?
2- What is the greatest amount of (NH₄)₂SO₄ that can be made with 3.7 moles of MgSO₄ and 4.8 moles of NH₃?
3- How many moles of the excess reactant is left over after the reaction has been completed?
PLEASE SHOW WORK