(a) When Jones was 17 years old, she took her stereo into the Mariposa Service Centre for an extensive repair job that cost $175. If she does not pay, can the Mariposa Service Centre sue her successfully?

(b) After Jones becomes of age, she picks up the repaired stereo and does nothing to repudiate her liability to the Mariposa Service Centre. Can the Mariposa Service Centre recover the money now?

(c) Upon becoming of age, Jones tells the manager of the Mariposa Service Centre in a telephone conversation that she will pay the $175. Can the Mariposa Service Centre recover now?