Let us assume that there is a stock market in which the CAPM is fully valid and that the market consists only of the five stocks that are listed in the table below:

Stock Current price in $ Number of shares outstanding in millions

Apple $5015$

Berkshire Hathaway $5001\mathrm{.}2$

Chevron $2015$

Disney $2010$

Exxon Mobile $1015$

Please calculate the weight of Berkshire Hathaway in the market portfolio of this stock market in $\%.$