A $60$Co$60$Co source with activity $14\mathrm{.}0$ CiCi is embedded in a tumor that has a mass of $0\mathrm{.}525$ kgkg$.$ The CoCo source emits gamma$-$ray photons with average energy of $1\mathrm{.}25$ MeVMeV. Half the photons are absorbed in the tumor, and half escape. What energy is delivered to the tumor per second?

Express your answer in jouls per second. What absorbed dose $($in radrad$)$ is delivered per second?

Express your answer in rads. What equivalent dose $($in remrem$)$ is delivered per second if the RBE for these gamma rays is $0\mathrm{.}700?$

Express your answer in rem. What exposure time is required for an equivalent dose of $200$ remrem $?$

Express your answer with the appropriate units.