B$-$ Provided below is the Tool life data for cutting low carbon steel with HSS tool. Draw the tool life relation and find the n and c exponent for the tool life equation. What is the tool life for $V=90f\frac{t}{m}in$

$\backslash$table$[[\backslash$table$[[$Cutting$],[$Speed$],[($ft$/$min$)]],150,120,100,70],[\backslash$table$[[$Tool Life$],[($min$)]],3,6,12,35]]$