$6.$ A solid uniform disk $($mass m disk $=0\mathrm{.}75$kg $.$ radius R $=12$cm $)$ and a block $($mass mhlock $0\mathrm{.}750$ kg$)$ are released at the same time at the top of the ramp $($h $=0\mathrm{.}5$m$)$ The coefficient of friction is the same for both $($mu $=0\mathrm{.}25)8=10^3$Hint: is this friction static or kinetic?d $=$ dwa$)$ Calculate the speed of each object at the bottom of the ramp.b$)$ Which object gets to the bottom first?c$)$ If the block was sliding without friction, how would your answer to $($b$)$ change? Explain, without doing any calculations.