please do it with reagular and valid relation algebra expresions and create tables where is it require. first questions is marked like $($a$-$ which is not shown$)$ second is marked like how it is showns $($b$)$ so please separate them and answer also the outputs$-$ resualts in the second question. try to avoid text i just need results. your colleague did it wrongly so pay attention now and try to solve this questions correctly.