Multiply $5 \sqrt{3}$ and $4 \sqrt{12}$.

For each question, select the proper option from four options given, to make the statement true : (Final answer only)

$(\sqrt{5}+\sqrt{3})(\sqrt{5}-\sqrt{3})=\ldots \ldots \ldots$

Convert following rational numbers in decimal form and state the kind of its decimal expansion

$\frac{25}{8}$

State whether each of the following statements is true or false

$(-1)^{11}=-1$

Find five rational numbers between $-\frac{3}{4}$ and $-\frac{1}{3}$

Are there two irrational numbers whose sum and product both are rationals? Justify.