a$.$ What is the expected return of Intel $$stock$?$

b$.$ What is the expected return of Boeing $$stock$?$

c$.$ What is the beta of a portfolio that consists of $50\%$ Intel stock and $50\%$ Boeing $$stock$?$

d$.$ What is the expected return of a portfolio that consists of $50\%$ Boeing stock and $50\%$ Intel $$stock$?($There are two ways to solve$$ this.$)$