Consider the following page reference string: $1,2,1,3,2,4,5,1,4,3,5,2,1,2,4,3,5$

What are the hit ratios for optimal replacement algorithm assuming $3$ and $4$ frames?

$0\mathrm{.}4$ and $0\mathrm{.}5$

$0\mathrm{.}5$ and $0\mathrm{.}6$

$0\mathrm{.}5$ and $0\mathrm{.}7$

$0\mathrm{.}6$ and $0\mathrm{.}7$