Final answer:
The portfolio risk increased between scenarios 1 and 2 due to the higher weights assigned to Tesla and Amazon.
Step-by-step explanation:
1) The portfolio risk increased between scenarios 1 and 2.
2) The portfolio risk increased because the weights assigned to Tesla and Amazon increased in scenario 2. Since Tesla and Amazon have higher levels of volatility compared to IBM and GE, their higher weights contributed to an overall increase in portfolio risk.