In array-based stack, elements are removed from: Select one: O a. the head of the stack O b. the bottom of the stack O c. the top of the stack O d. the end of the stack Stacks operate on data: Select one: a. LALO O b. FOFO O c. FIFO O d. LIFO Convert the following infix to postfix: (c+d)/(a+b-c)*e The resulted postfix is: Select one: O a. cd+ab+c-le Ob.cd+ab+c-e/ O c. cdabe++c-1 O d.cd+abc+-le* Convert the following expression to postfix: (M+M * N) Select one: O a MMN* + O b. none of these C. MMN + * O d. MM* N +