Task: Question Answering
Input (English): Problem: there are 7 executives , including the ceo and cfo , that are asked to form a small team of 4 members . however , the ceo and cfo may not both be assigned to the team . given this constraint , how many ways are there to form the team ? 
Options: a ) 25 , b ) 28 , c ) 30 , d ) 32 , e ) 35
Output (English): a