An Internet company chooses to advertise with banners on websites visited by a target customer group. The web advertiser offers two plans with the same final cost. The first plan offers 3,000 banner as for x dollars each plus a set-up fee of $50. The second plan offers 2,000 banner ads for x dollars each plus a set-up fee of $100. What is the cost per banner for each of the these plan? a $0.05 b $0.50 c $5.00 d 50.00​