4. To join Jungle Gymnastics Club, Sonja will pay a monthly fee of $30 and an intial fee of $200. If she chooses to join Brant Gymnastics Club, she will pay an initial fee of only $100 but the monthly fee of $50. Let C represents the total cost Let m represents number of months a) Write an equation that models the cost if Sonja joins Jungle Gymnastics Club. [A /1] Equation: b) Write an equation that models the cost if Sonja joins Brant Gymnastics Club. [A /1] Equation: c) After how many months are the costs the same? [A /4] Number of months: d) If Sonja plans to do gymnastics for 6 months, which club should she join? Why? Show calculations to get full marks. [A /2]