Using the MARIE computer assembly language, write a program that computes the following expression: z $=($a $*$ b$)*($c $*$ d$)*$ e$.$ The computer will read in the input values a$,$ b$,$ c$,$ d$,$ and e from the keyboard, and the final result $($z$)$ has to be displayed. In addition, every time an input value is read in$,$ it must be validated by checking that the input is a positive number. If it is positive display the number on the screen; otherwise display zero and end the program. Each time a multiplication of two numbers is needed, it has to be done using a multiplication subroutine. Remember that the MARIE instruction set does not have an instruction to execute multiplication, you must create a subroutine $($function$)$ that multiplies two

numbers and call it each time you need it$.$ The program must be tested in the MARIE simulator