Helpme please answer this

Why do interests rates on loans to be lower in a weak economy than in a strong one

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

What is the sum of these mixed numbers 4 2/3+ 3 1/9