A bit more complex... another seller's decision

Suppose your total valuation for multiple units of a good is given by $($in $$)$:

$\backslash$table$[[q,1,2,3,4,5,6,7,8],[V(q),22,42,58,68,76,80,82,83],[MV(q),22,20,16,10,8,4,2,1]]$

The price is $$7$ per unit. You already own $7$ units of the good. How many units should you sell?

a$)$ You will not sell any unit

b$)$ You will sell $1$ unit

c$)$ You will sell $2$ units

d$)$ You will sell $3$ units

e$)$ You will sell all units

HEC MONTR$$AL