Question 36Let $s_1,$ $s_2,$ $s_3$ be the respective sums of $n,$ $2n,$ $3n$ terms of the same arithmetic progression with $a$ as the first term and $d$ as the common difference. Let $R=s_3-s_2-s_1.$ Then $R$ is dependent on:$a$ and $d$$d$ and $n$$a$ and $n$$a,$ $d,$ and $n$neither $a$ nor $d$ nor $n$