3. Consider the following diagram showing transfer of data among CPU, Main Memory and Cache. a. Discuss with a suitable diagram how data can be transferred between main memory and cache memory given in diagram above, when using following methods: i. Direct mappping $(8+7=15$ Marks $$ ii. Set-Associative mapping $(5+5=10$ Marks $$ b. Discuss in detail the performance obtained when CPU performs total of $\mathbf{3 , 45 0,00 0}$ memory references. $1,200,000$ of which are miss in cache and 900,000 of which are hit in main memory. (10 Marks) CS.VS.997