Problem $2.(20$ points$)$ Consider the relational database defined in Problem $1.$ Express in rela

tional algebra each of the following queries:

$($a$)(10$ points$)$ Find the ID of each customer who has more than $2$ loans $($i$.$e$.,3$ or more loans$).$

$($b$)(10$ points$)$ Find the ID of each customer who has the largest number of loans $($i$.$e$.,$ each

customer who has no fewer loans than any other customer$).$