Answer: 1.20
Step-by-step explanation:
The Portfolio beta will be a weighted average of the individual stock betas.
Portfolio beta = (22% * 0.88) + ( 23% * 0.94) + ( 42% * 1.34) + ( 13% * 1.79)
= 0.1936 + 0.2162 + 0.5628 + 0.2327
= 1.2053
= 1.20