Please need help with both the problem!

Exercise 5.2. Write an assembly program that multiplies two 8-bit unsigned numbers using only shift and addition operations. Answers: e 5.8. Write an assembly program to generate the sequence of integers (1. 3,9, 27, 81,243), iteratively. The sequence can be generated using the relation, st 3st-1, with initial value s0 = 1 and executing the relation for five iterations. The result at each teration should he stored in the destinatinn renister R3