Problem 1: Bridge construction (Adapted from Trayfo (1998, pp130-1). Before construction begis, a bridge project goes through a number of stages of production, one of which is the design stage This phase is composed of various activities, each of which contributes directly to the overall design time, In short, predicting the design time is helpful for budgeting and internal as well as external scheduling purposes Information from 45 bridge projects was compiled for use in this study. The data is available at http: //gattonweb.uky.edu/sheather/book/docs/datasets/bridge.txt. The response and predictor variables are as follows Y Time- design time in person-days r1-DArea Deck area of bridge (in 1000 sq ft) r2-CCost Construction cost (in $1000) 3-Dwgs- Number of structural drawings rA Length Length of bridge (ft) Number of spans r5-Spans We are going to use log transformation on all variables. Check the scatter plot matrix and histogram of each variable before and after log transformation. You do not need to add any plots in your submission. ##Import 2nd through 7th column of the dataset br- read.table'http://gattonweb.uky.edu/sheather/book/docs/datasets/bridge.txt', headerT), pairs (br) ##scatter plot matrix names