Please provide steps to answer so I can answer future questions like this

A phone company offers two long distance plans. The first charges a flat value of $5.00 per month plus $0.99 for each minute used, and the second charges $10.00 a month plus $0.79 for each minute used. If x represents the number of minutes used each month, which system of equations represents the total amount of money, y, you would spend for each long distance plan? O a.) y = 0.99x +5 y = 0.79x + 10 O b.) x = 0.99y +5 x = 0.79y + 10 O c.) y = 5x + 0.99 y = 10x +0.79 O d.) x = 5y +0.99 X = 10y +0.79y