$6($a$).$ Find the output expression using step ky step for the following input expression:

Input expression $=(50+20)*\frac{70-10}{25-15}$

Also draw the binary tree for the problem.

$6($b$)$: Using algorithm discuss in the class, process the output expression obtained in

$6(a)$ from the input expression to get the output value.

$(20$ Marks$)(2-3$ Pages$)$