Portfolio Return

Consider an investor who just made a portfolio consisting of $100$ shares of PNM Resources stock $($PNM$)$ and

$10$ shares of Exxon Mobile stock $($XOM$),$ when PNM was worth $$50$ per share and XOM was $$120$ per share.

Suppose a year later, the PNM price rises to $$60$ per share, and the XOM price rises to $$125$ per share.

$($a$)$ Find the rate of return on each of the two stocks.

$($b$)$ Find the fraction of total investment held in each of the two stocks.

$($c$)$ What is the return on the portfolio?

$($d$)$ How much is the portfolio worth in year one?