$|----------------------|-------------------||0|20||6|25||12|30||18|28||24|22|$Using Linear Regression, find the value of f$(15)$ via the function f$($x$)=$ a$=$ a $+$ a$1$x$|$ X $|5|7|12|16|20||----|----|----|----|----|----||$ Y $|40|120|180|210|240|$Given the velocity function with respect to time, v$($t$)=1/1+($t$-5)^2$is in m$/$s$.$ Find the distance covered by the body from t $=4\mathrm{.}5$ to t $=5\mathrm{.}5$ seconds by using theOne segment Trapezoidal RuleTwo segment Trapezoidal RuleFind the absolute relative approximate error of the two results.