In a functional language, using the map and reduce higher order functions, write code that will compute the following. $($Do not use more complex built$-$in functions like sum and filter, but if statements are okay.$)$a$)$ The sum of all positive numbers in integer array xs $(1$ Point$)$b$)$ The sum of squared differences between integer array xs and ys$.[$You can use zip to combine xs and ys element$-$wise.$](1$ Point$)$Example:$1234$ let xs $=[3,4,5,10,15]$ let ys $=[0,4,6,11,17]$ Part a $=30$Part b $=15$