Answer both please

$[$TLB Effective Access Time$]$ Assume a system has a TLB hit ratio of $90\%.$ When a TLB hit occurs, it takes $210$ nanoseconds to access a desired instruction or data in memory. In case of a TLB miss, the access time to a desired instruction or data in memory becomes $410$ nanoseconds. If we assume the TLB access time is $10$ nanoseconds, $1)$ what is the memory access time? $2)$ Additionally, what is the effective memory access time in nanoseconds for this system?

Use the following page table, find the physical address corresponding to the virtual address $51,874($page size $=4,096$ bytes$).$ Describe all the steps to map the virtual address to the physical addres.

PAGE TABLE:

$\backslash$table$[[$Page #$,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15],[$Frame #$,7,12,31,32,33,34,9,2,3,16,17,19,21,22,26,28]]$