A5­stage single pipeline computer uses the pipeline mentioned in the lecture (not the book). it resolves the direction and target of a conditional branch instruction at the end of its third pipeline stage. when a branch is detected, the pipeline quashes the subsequent instructions already in the pipeline and stalls until the branch is resolved. after that, execution resumes at the target or the fall-through instruction, based on the branch condition. how many cycles does the pipeline stall upon a branch? (i. e, how many cycles are lost? )