$16\mathrm{.}2$ If a power of $100$ W is developed by $($a$)$ the Godiva$-$type reactor of mass $50$ kg $(93\mathrm{.}9$ w$/$o enrichment$)$ or $($b$)$ the Jezebel$-$type reactor of mass $17$ kg$,$ what is the average flux within each respective assembly? answer for a is $1\mathrm{.}96*10^10$ cm$^2$ s$.$