2. Implement an assembly loop that writes 10, 8, 6, ..., 2 on PORTB. 100 3. Implement an assembly loop that calculates 2 xi and saves the result to W4. 2. Implement an assembly loop that writes 10, 8, 6, ..., 2 on PORTB. 100 3. Implement an assembly loop that calculates 2 xi and saves the result to W4