Question 893814
Part a)

Number of ways= 49 C 4= 211876

Part b)

Number of ways of choosing a president=       49 C 1= 49
Number of ways of choosing a Vice president=  48 C 1= 48
Number of ways of choosing a secretary=       47 C 1= 47
Number of ways of choosing a treasurer=       46 C 1= 46

Total number of ways= 49*48*47*46 = 5085024