For the following questions answer them individually
Who among the following is an Indian social activist associated with Narmada Bachao Andolan?
If '$$\times$$' means '$$+$$', '$$+$$' means '$$\times$$' and '$$-$$' means '$$\div$$', then find the value of $$(1 \times 2) + (3 \times 4) - (4 \times 5) + 9$$.
Ages of a mother and daughter are in the ratio 9 : 2. The daughter was born when the mother was 28 years. How old is the daughter?