Which of the following statements is TRUE?

Beta measure's the amount of systematic risk present in any given asset relative to an average asset, e$,$g$.,$ a stock to "the market".

If a stock's beta is $1\mathrm{.}8,$ it means that this stock is less risky than an average stock in the market.

The beta of any portfolio must be $1\mathrm{.}0.$

A stock that is three$-$quarters as risky as the market should have a beta of $1\mathrm{.}75.$