The plot below is a radial distribution function shown without quantitative axes. Use it to answer the questions below.

a$)$ How many radial nodes does this orbital have?

b$)$ Name every $s,p,$ and $d$ orbital with $n3$ that could feasibly be represented by this plot $($there are $9).$

c$)$ If the plot shown here has a maximum closest to the nucleus of all the possibilities in part b$,$ which orbital would you predict it to be$?$