Suppose our query has only one term, briefly answer in $1$ or $2$ sentences for each of the

following questions on the effects of varying different parameters to the RSVBM$25.$

Assuming all other parameters are fixed:

$($A$)$ What is the effect on RSVBM$25$ of varying b from $0$ to $1?$

$($B$)$ What is the effect on RSVBM$25$ when tfi goes to infinity?

$($C$)$ How would you manipulate the parameters k$1$ and b so that RSVBM$25$ approximates

TF$-$IDF? Justify your answer.