Answer the following: (d) Meena, Beena and Leena are climbing the steps to the hill top. Meena is at step s, Beena is 8steps ahead and Leena 7 steps behind. Where are Beena and Meena? The total number of steps to the hill top is 10 less than 4 times what Meena has reached. Express the total number of steps using s.

In the first minute Geeta climbs 15 steps of a building. After that she climbs 3 steps less than in the previous minute. The total number of steps climbed by Geeta in 5 minutes is:

A water tank has steps inside it. A monkey is sittin on the topmost step (i.e.,the first step). The water level is at the ninth step. If the number of steps moved down is represented by negative integers and the numbe of step moved up by positive integers, represent his moves in par (i) and (ii) by completing the following: (a) -3+2... =-8 (b) 4-2+...=8. in (a) the sum (-8) represents going down by eight steps. So what will the sum 8 in (b) represent?

Consider the following statements: (1) Bridgehead halides are inert towards both S_(N^1) and S_(N^2) reactions (till oneofthe ringsize is eight member ring) (2) The first step in both S_(N^2) and E_1 reactions is the same (3) S_(N^2) reactions proceed with total retention of configuration (4) E_2 eliminations are by the use of a solvent of low polarity and high concentration of a strong base Which of the above statements are correct?