Complete the function findValuation that returns the expected price of a house using linear interpolation, given arrays of historic house areas and prices. The function should round the result to the nearest integer. Function signature: findValuation(reqArea: int, area: list of int, price: list of int) -> int, where reqArea is the area of the candidate house, area[i] is the area of the ith house sold, and price[i] is its price. Constraints: 500 < reqArea < 10^5, 500 < area[i] < 10^5 for all i.