How can the code be modified to sum the Fibonacci sequence instead of printing it$?($: $1)$ Use print$($a $+$ b$)$ inside the loop. Replace print$($a$)$ with sum$($a$,$ b$).$ Add a variable to store the sum and update it inside the loop. Use a $+=$ b in place of a$,$ b $=$ b$,$ a $+$ b$.$