$5.$ "Buyan" company started trading with preferential rights $($vouchers$)$ by issuing new shares. The price of shares traded with rights is $500$ MNT$,$ the subscription price of one share is $360$ MNT$,$ and $6$ rights are required to buy a newly issued share.a$)$ Determine the value of the rights to the shares traded.b$)$ If you were offered to buy a unit right for $25$ MNT$,$ would you buy the right?