Marta's starting annual salary is 24,900. at the beginning of each new year, she receives a $2700 raise. write a recursive formula to find marta's salary f(n) after n years. what will marta's salary be after 4 years? a. f(n)=f(n-1)-2700; 35,700 b. f(n)=f(n-1)+2700; 33,000 c. f(n)= 2700f(n-1); 33,000 d. f(n)=-2700f(n-1); 35,700