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Figure $1$ shows the amount of work distribution, in man-hours, for a software between offshore and onsite activities. Figure $2$ shows the estimated and actual work effort involved in the different offshore activities in the same company during the same period. [Note: Onsite refers to work performed at the customer's premise and offshore refers to work performed at the developer's premise.]

The total effort in man-hours spent onsite is nearest to which of the following?

1. The sum of the estimated and actual effort for offshore design
2. The estimated man-hours of offshore coding
3. The actual man-hours of offshore testing
4. Half of the man-hours of estimated offshore coding