How many persons are senior to C?

Answer the questions based on the information given below. Seven persons A, B, C, D, E, F and G work in Indian air force. Each of them has designation in the order of precedence
i.e. ACM, AM, AVM, AC, GC, FL and FO such that ACM is the senior most person and FO is the junior most person. Each of them works on different days of a week from Monday to Sunday. G is not an FO. D is neither GC nor FO. F is a AVM. C works on Monday. E is a AC and works on Wednesday. Three persons have work day before
A. Person, who works on Saturday is junior of at least four persons. ACM works just before the work day of AM. F works on neither Sunday nor Tuesday. D’s work day is just before G.