Problem with nested loop Join, Please explain each step for further understanding

This problem will explore different join implementations and the associated IO costs for each model. Let R(a,b),S(b,c), and T(c,d) be tables. For the purpose of this question, use the values provided below. - P(R)= number of pages of R=20 - T(R)= number of tuples of R=1600 - P(S)= number of pages of S=200 - T(S)= number of tuples of S=15000 - P(T)= number of pages of T=2000 - P(R,S)= number of pages in output RS=100 - P(S,T)= number of pages in output ST=1000 - P(R,S,T)= number of pages in output RST=500 - B= number of buffer pages =32 Question 4.1 [1 point ] Let us start by considering a simple nested loop join. Compute the IO cost for a simple nested loop join if R is the "outer loop" and S is the "inner loop." Question 4.2[1 point ] Compute the IO cost for a simple nested loop join if S is the "outer loop" and R is the "inner loop